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		<title></title>
		<description>Discuss </description>
		<link>https://boredomprojects.net</link>
		<lastBuildDate>Sat, 04 Apr 2026 15:58:27 +0000</lastBuildDate>
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			<title>confirmation ADC_BITS</title>
			<link>https://boredomprojects.net#comment-378</link>
			<description><![CDATA[Hi, thanks. Yes I have: analogReadResolution(ADC_BITS) ; // DUE can have up to 12 bits of ADC resolution and have confirmed it is detecting the arm architecture and being set to 12, as per: #if defined(__arm__) #define ADC_BITS 12 #else #define ADC_BITS 10 #endif]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Thu, 05 Dec 2019 00:02:54 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-378</guid>
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		<item>
			<title>can you confirm that you added this line?</title>
			<link>https://boredomprojects.net#comment-377</link>
			<description><![CDATA[can you confirm that you added this line? analogReadResolution(ADC_BITS) ;]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Wed, 04 Dec 2019 19:17:58 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-377</guid>
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		<item>
			<title>Clamps</title>
			<link>https://boredomprojects.net#comment-376</link>
			<description><![CDATA[the only other thing i can think of is I've got 30A CT clamps. Would that make a difference? Sorry for so many posts! :)]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Wed, 04 Dec 2019 09:18:51 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-376</guid>
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			<title>Power samples</title>
			<link>https://boredomprojects.net#comment-375</link>
			<description><![CDATA[Also, after rebuilding my prototype board onto your Fritzing board, am still getting in the order of 4000-5000 power samples/cycle. As I've rebuilt it, I am ruling out a short anywhere which could be doing something funky. Start: 613 millis numberOfSamples=5438 numberOfPowerSamples=4332 crossCount=16 End: 773 millis Start: 773 millis numberOfSamples=5328 numberOfPowerSamples=4226 crossCount=16 End: 933 millis Start: 942 millis numberOfSamples=5378 numberOfPowerSamples=4270 crossCount=16 End: 1102 millis I'm using a Due and have set 12 bit resolution. PHASE2 is set to 65 and PHASE3 is 130, but as my sample size is so large, perhaps these numbers are not right? Do you have any ideas on what I should look into next? Maybe I need a script to test the resolution of my Due? Any help would be greatly appreciated. Cheers!]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Wed, 04 Dec 2019 09:13:45 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-375</guid>
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		<item>
			<title>Calibration</title>
			<link>https://boredomprojects.net#comment-374</link>
			<description><![CDATA[Hi, I've come back to this & have it all working but still trying to figure out calibration. How do you know which wire (red/white/blue) is which phase? I used this link: https://i.stack.imgur.com/HUD42.jpg (I'm in Australia) but my PH2 & 3 calibration numbers are quite large in order to achieve sensible numbers, and PH3 reports as negative. A0 is spot on, as is the voltage (which is connected to the same phase as A0/Red), using a 2000W kettle. emon[0].voltage(11, 348.0, 1.6, 1);//RED emon[0].current(0, 98.8); emon[1].voltage(11, 348.0, 2.0, 2);//WHITE emon[1].current(1, 820.0); emon[2].voltage(11, 348.0, 3.0, 0);//BLUE emon[2].current(2, 220.0); emon.calcVI(16,2000); EmonTx.voltage = (float)emon[0].Vrms; Results: V: 243.24 A0 rP: 1733.49 A1 rP: 1723.25 A2 rP: -1796.23 I used the same CT clamp for each calibration & ensured it was clipped on in the correct orientation.]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Wed, 04 Dec 2019 09:12:48 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-374</guid>
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		<item>
			<title>RE: Fritzing design</title>
			<link>https://boredomprojects.net#comment-373</link>
			<description><![CDATA[Hi, it appears you are right. 3.3V to RFM12B seems to be not connected. I wonder why fritzing tool did not highlight this error... Thanks for pointing this out!]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sun, 01 Dec 2019 06:51:48 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-373</guid>
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			<title>3.3v</title>
			<link>https://boredomprojects.net#comment-372</link>
			<description><![CDATA[oh, just learnt about the ioref pin :)]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Thu, 28 Nov 2019 13:39:35 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-372</guid>
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			<title>Fritzing design</title>
			<link>https://boredomprojects.net#comment-371</link>
			<description><![CDATA[Hi, I've used your fritzing design to print out some boards and have stumbled upon an issue that I thought I would post here, in case anyone else has the same problem. It appears the 3.3v to the RFM12B module is not routed through on the board. I've solved it by running another wire from the 3.3v to the positive of the capacitor for the RFM module. Cheers Reagen]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Thu, 28 Nov 2019 12:24:12 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-371</guid>
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			<title>Almost There, got it working, but the 9V AC-AC adapter is not providing a very stable voltage reading.</title>
			<link>https://boredomprojects.net#comment-370</link>
			<description><![CDATA[Almost There, got it all working, but the 9V AC-AC adapter is not providing a very stable voltage reading. I am now waiting on a ZMPT101B for the voltage sensor instead of using the AC-AC adapter. I understand this is not as safe, I am willing to accept that and will be sure that the module and wires going to it are secured and insulated well. I will also make sure there is a fire alarm right by the panel. I also ordered a cheap DSO150 Oscilloscope to help with calibrating the ZMPT101B https://i.imgur.com/cIPcmNn.jpg https://i.imgur.com/UddK2yK.jpg https://i.imgur.com/WJBYR7W.jpg https://i.imgur.com/HdGP9su.jpg https://i.imgur.com/xZrw58M.jpg https://i.imgur.com/NLrCYgX.jpg https://i.imgur.com/epTiXaY.jpg]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Sat, 23 Nov 2019 23:24:39 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-370</guid>
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			<title>the audio jacks I bought didnt fit in the shield pcb holes.</title>
			<link>https://boredomprojects.net#comment-369</link>
			<description><![CDATA[the audio jacks I bought didnt fit in the shield pcb holes, but you can use a 1/16 drill bit and drill out the ones for the audio jacks. BAH! I will also note that I should have looked more closely at the audio jack style. You want to use audio jack that elevates the audio jack plug away from the PCB, if the audio jack you use has the hole for the plug practically flush with the PCB, then it does not really work that well. The ones used by boredman look similar the replacements I just ordered.]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Sun, 27 Oct 2019 01:26:38 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-369</guid>
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			<title>How about ESP32 for more inputs?</title>
			<link>https://boredomprojects.net#comment-368</link>
			<description><![CDATA[The ESP32 has 18 12bit analog inputs, its got a 160MHz dual core processor as well. I actually found a couple energy projects using it. After a bit of reading im not sure the esp32 is a good idea, seems its less reliable readings than some ADCs edit: I am thinking for the panels were i need more than 11 CTs I could possible add a MCP3208 to the arduino. I will have to read up on this some more.]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Fri, 25 Oct 2019 18:09:04 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-368</guid>
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			<title>RE: is it possible</title>
			<link>https://boredomprojects.net#comment-367</link>
			<description><![CDATA[ The actively maintained library for the ENC28J60 is "EtherCard" and it does not support the Due according to their page. I have read however that the w5500 works with the due using the arduino Ethernet library. https://www.arduino.cc/en/reference/ethernet]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Sat, 19 Oct 2019 19:37:22 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-367</guid>
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			<title>RE: 6 Extra Wires</title>
			<link>https://boredomprojects.net#comment-366</link>
			<description><![CDATA[Hi If you open the design file in Fritzing, in PCB view you should see the six dotted lines representing connections that must be completed by soldering wires. Probably it is easier to wire those on the bottom side of the board. Let me know how this works out.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Thu, 05 Sep 2019 13:18:02 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-366</guid>
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			<title>6 Extra Wires</title>
			<link>https://boredomprojects.net#comment-365</link>
			<description><![CDATA[Hi - Just finished the PCB soldering and noticed that you mentioned the 6 extra wires for the install - Im not sure If I missed somethiing but Im not sure if the connections that need to be added or documented on here?? Thanks! and Great work on this!]]></description>
			<dc:creator>Robotica72</dc:creator>
			<pubDate>Wed, 04 Sep 2019 17:08:49 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-365</guid>
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			<title>What gauge wire did you use to make all the connections on the bottom of your Arduino shield?</title>
			<link>https://boredomprojects.net#comment-364</link>
			<description><![CDATA[I cannot tell for sure but it looks like you used solid core wire for the connections on the bottom of the arduino shield? I also cannot tell what guage it is, thank you. EDIT: did some reading about breadboard wiring, etc. Seems solid core ethernet wire is a good choice for this type of work.]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Mon, 05 Aug 2019 17:45:23 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-364</guid>
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			<title>RE: North America uses three-wire single-phase, so on 220 circuit (2 pole) I should be able to use a single CT correct?</title>
			<link>https://boredomprojects.net#comment-363</link>
			<description><![CDATA[You are correct, my clamp meter came in today, and if I clamp around 2 wires on the same 110 pole then it shows cumulative amps. but if I clamp around 2 wires that go to the different 110 poles, as with my water heater and dryer then the two cancel each other out. Thanks!]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Mon, 05 Aug 2019 17:43:45 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-363</guid>
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		<item>
			<title>RE: North America uses three-wire single-phase, so on 220 circuit (2 pole) I should be able to use a single CT correct?</title>
			<link>https://boredomprojects.net#comment-362</link>
			<description><![CDATA[I'm not sure about that. It might be that your 220v lines are actually a split-phase connection, where the currents in the two wires are 180° out of phase. In this case, a single CT would not measure anything at all. Check this out: https://en.m.wikipedia.org/wiki/Split-phase_electric_power]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Fri, 02 Aug 2019 23:06:47 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-362</guid>
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			<title>North America uses three-wire single-phase, so on 220 circuit (2 pole) I should be able to use a single CT correct?</title>
			<link>https://boredomprojects.net#comment-361</link>
			<description><![CDATA[I was reading the article here: https://ctlsys.com/support/measuring_multiple_circuits_with_one_ct/ So for instance my Clothes Dryer and Water heaters both use 220V they are wired to a double pole double throw breaker with 2 hot wires. I should be able to place the CT clamp around both the wires going to this breaker and be able to measure that 220V circuit with a single CT clamp, correct? So long as the CT clamp is properly rated, I have read you want to choose a CT clamp that is rated for about 100% of your expected current measured. (I have oredered an inexpensive Clamp meter so I can verify amps under load.)]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Fri, 02 Aug 2019 17:45:39 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-361</guid>
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			<title>RE: Awesome! Thank you!</title>
			<link>https://boredomprojects.net#comment-360</link>
			<description><![CDATA[Thanks for good words about this project! Since it seems you only have single phase power in your home, I'd suggest to use the original EmonLib software from here: https://github.com/openenergymonitor/EmonLib Best of luck!]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Thu, 01 Aug 2019 15:10:04 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-360</guid>
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			<title>Awesome! Thank you!</title>
			<link>https://boredomprojects.net#comment-359</link>
			<description><![CDATA[Thank you so much for clarifying that for me. I was hoping you would say something along those lines for the "burden" term because I could not find any difference between it and the other resistors in the BOM. I have the rest of the parts ordered and cant wait to put it all together. It is really great that you shared this because more people really should be aware of the power they are consuming! I really appreciate it! It is hard to believe I have not invested in setting something like this up sooner than now! I live in the United States, my electric panels only have 110 (single wire to breaker) or 220 (two wires to double throw breaker). I am not certain what this means for the different phases in the code, I do not have any 440. Is there anything that is going to need to be changed with the code because of this? I am atleast a month away from being able to work on this because of ebay shipping speed.]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Tue, 30 Jul 2019 17:31:51 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-359</guid>
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			<title>RE: parts list help</title>
			<link>https://boredomprojects.net#comment-358</link>
			<description><![CDATA[The brand of capacitors and resistors does not matter at all. The only "strain" the parts are under is the max dissipating power for resistors and max DC voltage for capacitors. The types listed in BOM are more than capable of withstanding the strain in this application. The 22ohm resistor is called burden because of how it is used in the circuit, not because of its type. Its purpose in the circuit is to conduct and "burden itself" with current generated by the current probe.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Tue, 30 Jul 2019 11:33:59 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-358</guid>
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			<title>ADS1115 results.</title>
			<link>https://boredomprojects.net#comment-357</link>
			<description><![CDATA[Did you end up using the ADS1115 with your Arduino Due?]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Tue, 30 Jul 2019 04:21:39 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-357</guid>
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			<title>parts list help</title>
			<link>https://boredomprojects.net#comment-356</link>
			<description><![CDATA[Ive ordered the arduino due, mega shield, ENC28J60, audio jacks, 6 pin double row female header. that just leaves the capacitors and resistors, are there any brands in particular I should look for? how much strain are these put under? I know from my limited electronics experience that some capacitors can be really awful. this one seems to be really hard to find in particular: 1 Ceramic Capacitor package 100 mil [THT, multilayer]; voltage 6.3V; capacitance 100nF EDIT: Fritzing did not load correctly on linux, so i checked it out in my Windows VM, the 100nf ceramic capacitor is for the Wireless Radio, and since I am going to be using ENC28J60 isntead, I can skip that one! yay! Also for the 22ohm resistor, higher up I seen you called it a burden resistor? is that somehow different from a regular resistor? EDIT: dont use ENC28J60 the ethercard library does not support it, if your planning to use ethernet use w5500 instead.]]></description>
			<dc:creator>xekon</dc:creator>
			<pubDate>Mon, 29 Jul 2019 07:51:51 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-356</guid>
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			<title>UPDATE</title>
			<link>https://boredomprojects.net#comment-355</link>
			<description><![CDATA[Hi again guys, By changing the value of Phasecal I manage to get the right PF and the right Real Power values. I'm working with a Phasecal = -1.9. Only a negative value allowed me to get the right PF and RP values. Does that represent a problem? Thanks again ;)]]></description>
			<dc:creator>barrosinsanus</dc:creator>
			<pubDate>Wed, 10 Apr 2019 09:29:48 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-355</guid>
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			<title>Problem with Power Factors</title>
			<link>https://boredomprojects.net#comment-354</link>
			<description><![CDATA[Hello guys! Thanks again for this amazing project. I've made simple adaptations to the project but the measurements are not correct. I get the right values of current and voltage but I can't get the right PF values (apparent current seems right but real power is not). I'm using 2 Analog Pins, one for voltage measurements and one for current measurements. Since these values are right (compared with a certificated and expensive Network analyzer), I assume that my circuits are also rightly implemented. Instead of DUE, I'm using an Arduino Mega 2560 and the circuit for the CT is powered from the 5V power line. For measuring voltage, I'm using a voltage sensor. Can the Arduino Mega be the problem to the error of PF? Thanks guys. Best regards!]]></description>
			<dc:creator>barrosinsanus</dc:creator>
			<pubDate>Tue, 09 Apr 2019 11:33:54 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-354</guid>
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			<title>RE: What wattage resistors are needed for this?</title>
			<link>https://boredomprojects.net#comment-353</link>
			<description><![CDATA[All components are THT. Resistors are standard 1/4watt, 5%, 6mm long, but obviously smaller 3.3mm long could be used as well. 6.3V caps are fine.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Thu, 04 Apr 2019 18:01:01 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-353</guid>
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			<title>What wattage resistors are needed for this?</title>
			<link>https://boredomprojects.net#comment-352</link>
			<description><![CDATA[I found the BOM and so people don't have to try to run Fritzing. What wattage resistor is needed and is 6.3v cap fine? BOM 1	Ceramic Capacitor	package 100 mil [THT, multilayer]; voltage 6.3V; capacitance 100nF 12	Electrolytic Capacitor	package 100 mil [THT, electrolytic]; voltage 6.3V; capacitance 10µF 1	10kΩ Resistor	package THT; pin spacing 400 mil; bands 4; tolerance ±5%; resistance 10kΩ 1	6.8kΩ Resistor	package THT; pin spacing 400 mil; bands 4; tolerance ±5%; resistance 6.8kΩ 25	100kΩ Resistor	package THT; pin spacing 400 mil; bands 4; tolerance ±5%; resistance 100kΩ 11	22Ω Resistor	package THT; pin spacing 400 mil; bands 4; tolerance ±5%; resistance 22Ω 1	RFM12b HopeRF Transceiver 1	Generic double row female header - 6 pins	package THT; pin spacing 0.1in (2.54mm); hole size 1.0mm,0.508mm; form ♀ (female); row double; pins 6 12	Audio Jack (TRS) 3.5mm	package 4Ucon 08780 [THT]; size 3.5 mm; channels Stereo (TRS)]]></description>
			<dc:creator>kde5fan</dc:creator>
			<pubDate>Thu, 04 Apr 2019 15:40:43 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-352</guid>
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			<title>List of parts needed?</title>
			<link>https://boredomprojects.net#comment-351</link>
			<description><![CDATA[Is there a list of parts needed to complete this project? A "BOM". Also, is there any other way to open the FZZ file, because it just won't install on my system.]]></description>
			<dc:creator>kde5fan</dc:creator>
			<pubDate>Thu, 04 Apr 2019 04:23:43 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-351</guid>
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			<title>Using ESP32</title>
			<link>https://boredomprojects.net#comment-350</link>
			<description><![CDATA[Thank you very much. I'm going to try something different, in case I come and inform you and share the solution. Thank you :)]]></description>
			<dc:creator>Renato_E</dc:creator>
			<pubDate>Mon, 07 Jan 2019 14:34:29 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-350</guid>
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			<title>RE: Using ESP32</title>
			<link>https://boredomprojects.net#comment-349</link>
			<description><![CDATA[Hi Renato. Thanks for good words about the project! :) Unfortunately, I'm not at all familiar with ESP32, so cannot really give any suggestions. But you would at least need to look at the following things: * incompatible Analog-to-Digital converter code * Radio interface might need to be different (not RFM12B) * PHASE2 and PHASE3 constants are highly dependent of CPU speed, so you may need to modify them dramatically. In general, it might be a lot of work to adapt to ESP32.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 07 Jan 2019 12:54:08 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-349</guid>
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			<title>Using ESP32</title>
			<link>https://boredomprojects.net#comment-348</link>
			<description><![CDATA[Hi, first of all I would like to congratulate you on the project! I used it on the Uno Arduino and it worked everything! Now I am trying on ESP32 and I can not get a satisfactory result, I made the modifications in Lib for 12 bits and still I have failed. Have any tips to run this project on ESP32? Thank you.]]></description>
			<dc:creator>Renato_E</dc:creator>
			<pubDate>Mon, 07 Jan 2019 01:53:52 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-348</guid>
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			<title>RE: Problem with measures</title>
			<link>https://boredomprojects.net#comment-346</link>
			<description><![CDATA[The library calculates power by taking near-simultaneous measurements of voltage (ac-ac adapter) and current (ct coil). So, I would recommend to use at least two analog inputs on your micro, one for voltage and another for multiplexed current inputs. You would have to rework the library accordingly to insert commands to the multiplexer in the right moments. For example, before each call to calcVI() function.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 13 Oct 2018 15:45:55 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-346</guid>
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			<title>Problem with measures</title>
			<link>https://boredomprojects.net#comment-345</link>
			<description><![CDATA[Thanks for the replies. Maybe I should specify my problem. I'm trying to use a multiplixer to increase the number of analg inputs of my microcontroller. With the multiplexer, all coils are connected to one analog input so i can't calibrate each one of the inputs separately. So my idea was to understand how the libraries work so I could implement all the calibrations, via code, on the output of the multiplexer. Does that makes any sense? Thanks again.]]></description>
			<dc:creator>barrosinsanus</dc:creator>
			<pubDate>Fri, 12 Oct 2018 09:37:22 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-345</guid>
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			<title>Problem with measures — barrosinsanus</title>
			<link>https://boredomprojects.net#comment-344</link>
			<description><![CDATA[Voltage and current are measured via the analog inputs of the system. Depending on the country, the frequency of AC voltage is 50 or 60 Hz, the analog inputs measure this at a higher frequency, perhaps 200 times per seconds or more, so the system is able to calculate mean or effective voltage and current from these measurement samples. Power = voltage x current x power factor. The power factor is the cosinus of the phase shift angle between voltage and current. So when comparing the voltage and current measurements, the software is also able to calculate the phase angle between voltage and current, which gives us the power factor.]]></description>
			<dc:creator>mabo</dc:creator>
			<pubDate>Fri, 12 Oct 2018 08:37:31 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-344</guid>
		</item>
		<item>
			<title>RE: Problem with measures</title>
			<link>https://boredomprojects.net#comment-343</link>
			<description><![CDATA[Hi! Openenergymonitor.org site has many useful guides on these topic. Here's one of them on Voltage adapters: https://learn.openenergymonitor.org/electricity-monitoring/voltage-sensing/measuring-voltage-with-an-acac-power-adapter And on calibration: https://learn.openenergymonitor.org/electricity-monitoring/ctac/ct-and-ac-power-adaptor-installation-and-calibration-theory]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Thu, 11 Oct 2018 23:21:09 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-343</guid>
		</item>
		<item>
			<title>Problem with measures</title>
			<link>https://boredomprojects.net#comment-342</link>
			<description><![CDATA[Hello everyone. I'm trying to implement this project but i'm bumping into a problem. I understand the concepts of Real Power and the Potency Factor but i don't understand how they can be measured. How is the coil's Voltage output related with these parameters? And what's the best way to calibrate my coils? I'm using the yhdc sct 013 100mA:50mA coils as well. Thanks!]]></description>
			<dc:creator>barrosinsanus</dc:creator>
			<pubDate>Thu, 11 Oct 2018 10:01:19 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-342</guid>
		</item>
		<item>
			<title>RE: Memory</title>
			<link>https://boredomprojects.net#comment-340</link>
			<description><![CDATA[Hm... no, that doesn't seem right. Are you using Due or some other board? What are your PHASE2 and PHASE3 constants set to? For Due they should be around 65 and 130, which represent nr. of samples for 120° and 240° of a cycle. That's why 2 cycles of data should be around 400 samples. Also, make sure you set ADC to 12 bits with analogReadResolution() call, as in the example sketch.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 09 Jun 2018 08:08:58 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-340</guid>
		</item>
		<item>
			<title>Memory</title>
			<link>https://boredomprojects.net#comment-339</link>
			<description><![CDATA[I think my issue is lack of memory. I've seen it mentioned that others are getting around 400 power samples per cycle but I seem to be getting around 4000. Does this seem right?]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Fri, 08 Jun 2018 07:33:47 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-339</guid>
		</item>
		<item>
			<title>RE: Code example</title>
			<link>https://boredomprojects.net#comment-338</link>
			<description><![CDATA[Thank you very much. I've just uploaded to the due and it works fine for a few samples and then starts getting odd results. Here is the output: numberOfPowerSamples=3982 Count,Shifted-V,Filtered-I 0,1001.37,-0.76 1,1004.54,-0.76 2,995.04,0.24 3,989.07,-0.76 ...[truncated for comment] 60,1038.93,0.22 61,1039.16,-0.78 62,1029.52,-0.77 63,1023.41,0.22 64,1025.79,-0.77 65,1012.83,-0.77 66,1013.26,0.23 67,1011.89,-0.77 68,-0.76,0.00 69,-0.76,0.00 70,0.24,ovf 71,-0.76,ovf 72,1.24,0.00 73,1.23,0.00 74,-0.77,ovf 75,-1.76,0.00 76,-0.76,0.00 77,0.24,nan 78,1.24,0.00 79,1.23,0.00 80,0.23,ovf 81,0.23,-0.00 82,-0.77,0.00 83,0.23,-0.00 84,-0.76,0.00 85,-0.76,-0.00 86,-0.76,0.00 87,1.24,ovf ... until the next cycle then repeat Update: seems like it is always going odd on count 68 (each cycle)]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Fri, 18 May 2018 02:09:56 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-338</guid>
		</item>
		<item>
			<title>RE: Code example</title>
			<link>https://boredomprojects.net#comment-337</link>
			<description><![CDATA[Oops! Just found and fixed a mistake in file :-)]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Tue, 15 May 2018 05:12:23 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-337</guid>
		</item>
		<item>
			<title>RE: Code example</title>
			<link>https://boredomprojects.net#comment-336</link>
			<description><![CDATA[Comment won't let me enter proper code :) Here's a link to complete file: https://boredomprojects.net/images/Articles/HomeEnergy/EmonLib_3PH_dump.cpp]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 14 May 2018 17:53:48 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-336</guid>
		</item>
		<item>
			<title>RE: Code example</title>
			<link>https://boredomprojects.net#comment-334</link>
			<description><![CDATA[Hi Reagen, Here's one way to do that: 1. add at line 79: //declare temporary arrays for storing raw data: double storedShiftedV[PHASE3]; double storedFilteredI[PHASE3]; 2. add at line 159: //store V and I samples for dumping later: storedShiftedV[numberOfPowerSa mples%PHASE3] = phaseShiftedV; storedFilteredI[numberOfPowerS amples%PHASE3] = filteredI; 3. add at line 194: //dump stored samples: Serial.print("numberOfPowerSam ples="); Serial.println(numberOfPowerSa mples); Serial.println("Shifted-V\tFil tered-I"); for(int i=0; i]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 14 May 2018 17:37:17 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-334</guid>
		</item>
		<item>
			<title>Code example</title>
			<link>https://boredomprojects.net#comment-330</link>
			<description><![CDATA[ Hi, I am coming from a different programming language (PERL) and cant work out how to buffer (store in array/hash?) the phaseShiftedV an filteredI, for printing out after the main loop. Would it be possible to provide any code to achieve this? Cheers, Reagen]]></description>
			<dc:creator>rsiedl</dc:creator>
			<pubDate>Fri, 11 May 2018 06:04:38 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-330</guid>
		</item>
		<item>
			<title>RE: One more question ?</title>
			<link>https://boredomprojects.net#comment-329</link>
			<description><![CDATA[Hi! I would guess you have not performed calibration yet. Here's a nice guide how to do that: https://learn.openenergymonitor.org/electricity-monitoring/ctac/calibration In general, we cannot be sure that the kettle is indeed exactly 2000W, that's why we need an external multimeter. Also, electronics inside eMon have uncertainties and need to be calibrated against what multimeter shows.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 03 Feb 2018 12:13:15 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-329</guid>
		</item>
		<item>
			<title>One more question ?</title>
			<link>https://boredomprojects.net#comment-328</link>
			<description><![CDATA[Hello again, it says on the electric kettle, that it operates with 2000 W. But when i measure it with a tool with U=229V and I=8A => P=1832W. Do you have any idea where those 168W could be lost?]]></description>
			<dc:creator>gtanev</dc:creator>
			<pubDate>Fri, 02 Feb 2018 12:02:45 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-328</guid>
		</item>
		<item>
			<title>RE: Please help</title>
			<link>https://boredomprojects.net#comment-327</link>
			<description><![CDATA[Thank you very much for the clear explanation! Good luck.]]></description>
			<dc:creator>gtanev</dc:creator>
			<pubDate>Sat, 20 Jan 2018 12:45:05 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-327</guid>
		</item>
		<item>
			<title>RE: Please help</title>
			<link>https://boredomprojects.net#comment-326</link>
			<description><![CDATA[Not quite. Real power = apparent power x power factor. Apparent power = V(rms) x I(rms) Power consumption = real power. This is what utility company is charging us for. So, you can directly take the real power produced by the software as the measure for power consumption. Power factor is just an indication of how reactive (or resistive) your loads are.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 20 Jan 2018 10:54:00 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-326</guid>
		</item>
		<item>
			<title>RE: Please help</title>
			<link>https://boredomprojects.net#comment-325</link>
			<description><![CDATA[Did I understand well: the power consumption = the real power * the power factor? For EmonTxDue, the exits are: 1 - voltage, 2 - real power of A0 3 - power factor of A0 4 - real power of A1 5 - power factor of A1 .... 22 - rssi the power consumption for A0 = the real power on A0 * power factor on A0? Is that correct ? Thanks, Cheers to you too! :-)]]></description>
			<dc:creator>gtanev</dc:creator>
			<pubDate>Thu, 18 Jan 2018 10:56:14 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-325</guid>
		</item>
		<item>
			<title>RE: Please help</title>
			<link>https://boredomprojects.net#comment-324</link>
			<description><![CDATA[Hi, An electric kettle is a purely resistive load, so, by definition, it's power factor would be 1. Therefore, the real power is calculated simply as voltage * current, in this case = 2 kW. Here's a good guide: https://learn.openenergymonitor.org/electricity-monitoring/ac-power-theory/introduction Cheers!]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 17 Jan 2018 20:51:15 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-324</guid>
		</item>
		<item>
			<title>Please help</title>
			<link>https://boredomprojects.net#comment-323</link>
			<description><![CDATA[Hello, I apologize in advance for the stupid question, but: If we plug in an electric kettle with 2 kilowatts and the voltage is 230 volts, how much should the value of Real Power and Power Factor (what gives the EmonTxDue) as a single-phase power supply?]]></description>
			<dc:creator>gtanev</dc:creator>
			<pubDate>Wed, 17 Jan 2018 11:09:08 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-323</guid>
		</item>
		<item>
			<title>RE: please help</title>
			<link>https://boredomprojects.net#comment-320</link>
			<description><![CDATA[You can use pretty much any AC-AC adapter producing about 9 to 12 V AC on its output. Input will depend, of course, on power voltage in your area. 220V, for example.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 04 Nov 2017 07:11:12 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-320</guid>
		</item>
		<item>
			<title>please help</title>
			<link>https://boredomprojects.net#comment-319</link>
			<description><![CDATA[Could you please provide me the AC / AC adapter features, input and output values]]></description>
			<dc:creator>jegnner</dc:creator>
			<pubDate>Fri, 03 Nov 2017 18:15:11 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-319</guid>
		</item>
		<item>
			<title>RE: Everything on Raspberry ?</title>
			<link>https://boredomprojects.net#comment-318</link>
			<description><![CDATA[Hi mabo, You're right. There's no reason not to use RPi instead of Arduino to do the measurements. There are plenty analog input add-on boards exist for Raspberry to do the job. We just have a to a distinction between measurement box and the data collection box. You need both. And both can be Raspberrys, I suppose. I used Arduino Due board because it was good enough to do the job on its own, as a single piece, since it has built in analog inputs, so no extra add-ons needed.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Fri, 25 Aug 2017 18:42:10 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-318</guid>
		</item>
		<item>
			<title>Everything on Raspberry ?</title>
			<link>https://boredomprojects.net#comment-317</link>
			<description><![CDATA[Hi, As I am looking to do a similar hobby project, I wondered if it would be possible to only use a raspberry pi, equipped with a analog hat, so why did you decide to use a raspberry + an arduino. Is this because you know the arduino and the libraries to read out the adc, or is it because of some raspberry performance issue making it impossible to only use a raspberry ?]]></description>
			<dc:creator>mabo</dc:creator>
			<pubDate>Fri, 25 Aug 2017 13:04:14 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-317</guid>
		</item>
		<item>
			<title>RE: Buy for own use</title>
			<link>https://boredomprojects.net#comment-316</link>
			<description><![CDATA[https://boredomprojects.net/index.php/comments#comment-315]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 18 Mar 2017 15:45:26 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-316</guid>
		</item>
		<item>
			<title>Buy for own use</title>
			<link>https://boredomprojects.net#comment-314</link>
			<description><![CDATA[Hi, I am interested to try out the Home Energy Monitoring system. Could you please let me know how I can order one. Thanks, Sharath]]></description>
			<dc:creator>sharuvman</dc:creator>
			<pubDate>Sat, 18 Mar 2017 03:32:59 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-314</guid>
		</item>
		<item>
			<title>Peacefair PZEM-004T and NodeMcu V3 ESP8266</title>
			<link>https://boredomprojects.net#comment-307</link>
			<description><![CDATA[I've been planning to try a Wireless Peacefair PZEM-004T Energy Monitor: https://www.hackster.io/flywire/wireless-peacefair-pzem-004t-energy-monitor-b4d5ff which has on-board data storage but I now realise there are a lot of safety issues with the PZEM-004t module design.]]></description>
			<dc:creator>flywire</dc:creator>
			<pubDate>Mon, 05 Dec 2016 11:24:07 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-307</guid>
		</item>
		<item>
			<title>RE: Use of RFM69HW instead of RFM12B</title>
			<link>https://boredomprojects.net#comment-306</link>
			<description><![CDATA[ I'm also trying to use the RFM69 with the due but i've stopped for lack of time. Maybe on year's end i'll resume it. We could talk more then. And if you find how to do it , please share .]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Mon, 07 Nov 2016 09:48:30 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-306</guid>
		</item>
		<item>
			<title>RE: Use of RFM69HW instead of RFM12B</title>
			<link>https://boredomprojects.net#comment-305</link>
			<description><![CDATA[Yes, I've also heard that RFM69 should be backwards compatible. Unfortunately, as far as I know, the existing library will not work with 69 directly, without modifications. I didn't researched this topic enough to understand why. There exist 69 specific libraries, although probably not for Due. You would have to make the mod yourself. Shouldn't be too difficult. The only difference is SPI related stuff. If you find a way to talk to 69 on Due, please share! :)]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 07 Nov 2016 07:35:02 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-305</guid>
		</item>
		<item>
			<title>Use of RFM69HW instead of RFM12B</title>
			<link>https://boredomprojects.net#comment-304</link>
			<description><![CDATA[While collecting the required components I was told that RFM69HW-443-S2 would be backwards compatible with the RMF12B. Would it be a good idea to use RFM69HW-443-S2 in the EmonTx shield?]]></description>
			<dc:creator>EddyBin</dc:creator>
			<pubDate>Sat, 05 Nov 2016 15:30:07 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-304</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-303</link>
			<description><![CDATA[Ac-ac adapter measures line voltage, so it should be connected to one of the three phases. Any one. Even the one with washing machine :-) I suggest you to read on explanation of the theory here: https://openenergymonitor.org/emon/buildingblocks/3-phase-power]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 01 Oct 2016 06:45:04 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-303</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-302</link>
			<description><![CDATA[I suppose it should be ok.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 01 Oct 2016 06:20:32 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-302</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-301</link>
			<description><![CDATA[One other thing. I remember somewhere that the ac-ac adapter was connected to the washing machine line. But it has to be alone, right? I mean you can't have the ac-ac and the washing machine line in the same input, do you? thanks]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Tue, 27 Sep 2016 11:22:01 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-301</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-300</link>
			<description><![CDATA[I was able to put the voltage and the current with correct values. But the power factor is not correct. But i wonder if i need it... I want the energy monitor to tell me how much each line is spending in watts. The real value the electricity companies charge is the power=voltagexcurrent, right? If so, then i can forget the power factor. Is this correct?]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Sun, 25 Sep 2016 21:36:14 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-300</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-299</link>
			<description><![CDATA[Hi, I would take a look at the third parameter to voltage() function - PHASECAL. It should not be zero. This parameter compensates phase error between sampling voltage and current for each phase. It is important to properly calibrate this parameter: https://openenergymonitor.org/emon/buildingblocks/ct-and-ac-power-adaptor-installation-and-calibration-theory]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sun, 25 Sep 2016 10:11:15 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-299</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-298</link>
			<description><![CDATA[And here is some more output. I hope you can make some sense of it Thanks startV=2003 startV=2039 SUPPLYVOLTAGE=3300 serialprint : 0.00 40.73 147.57 0.30 0.00]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Thu, 15 Sep 2016 22:52:09 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-298</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-297</link>
			<description><![CDATA[Hi My power factor and real power values are all wrong. the current, volt and apparent power are good. Here some of the code emon[0].voltage(1, 321.0, 0, 1); emon[0].current(0, 216.0); emon.calcVI(16,2000); and the output Current pin 0->0.74 Volt pin 0->227.47 realPower pin 0->-0.22 apparentPower pin 0->169.33 powerFactor pin 0->-0.00 Volt pin 1->229.24 Can you give some help? Thanks]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Wed, 14 Sep 2016 00:37:41 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-297</guid>
		</item>
		<item>
			<title>RE: max ct sensors</title>
			<link>https://boredomprojects.net#comment-296</link>
			<description><![CDATA[7 CTs + voltage sounds pretty good to me for a 8-bit controller. However, rbreuss seems to think that you can run up to 15 CTs on ATMega https://boredomprojects.net/index.php/projects/home-energy-monitor#comment-74 Hard for me to say. You will have a reduction in timing resolution, though, and as a result in measurement accuracy.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 17 Aug 2016 07:45:30 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-296</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-295</link>
			<description><![CDATA[Hi! Yes, it should definitely be possible. There are many BT modules available. You should be able to replace RFM12B code with one for your BT module. However, I have never done this myself and can not help with specifics, nor with how to handle the data on Android. If you do get it to work, please share!]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 17 Aug 2016 07:32:59 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-295</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-294</link>
			<description><![CDATA[You can find all info at: https://www.arduino.cc/en/Main/ArduinoBoardDue#documentation]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 17 Aug 2016 07:28:38 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-294</guid>
		</item>
		<item>
			<title>max ct sensors</title>
			<link>https://boredomprojects.net#comment-293</link>
			<description><![CDATA[I am running the code on an arduino nano with 7ct + voltage for some time now. I was wondering how many ct sensors you can connect to a mega? It has 16 analog inputs but there are mux shields available. This way you can connect 48 analog inputs, but would the mega be able to process them?]]></description>
			<dc:creator>jan</dc:creator>
			<pubDate>Tue, 16 Aug 2016 20:45:59 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-293</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-292</link>
			<description><![CDATA[Hi, thank you very much for the tutorial~! I would like to ask if it is possible to make this project with a bluetooth module which sends all the readings to Android phone instead of making the Data Collection Box above? On tight budget here... Thank you (Please excuse my poor English)]]></description>
			<dc:creator>ProjectNoob</dc:creator>
			<pubDate>Tue, 16 Aug 2016 06:50:45 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-292</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-291</link>
			<description><![CDATA[I was thinking more like it would give zero or something. I'll connect it and try again. BTW, What kind of power for the board? A USB 5v charger is good? or i need a transformer? thanks]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Mon, 15 Aug 2016 20:57:14 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-291</guid>
		</item>
		<item>
			<title>RE: Nan Value</title>
			<link>https://boredomprojects.net#comment-290</link>
			<description><![CDATA[Hi rjsc2000, Yes, AC-AC adapter is necessary to calculate realPower and other things. Remember, power = current * voltage ! Check out these guides: https://openenergymonitor.org/emon/buildingblocks/measuring-voltage-with-an-acac-power-adapter]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 15 Aug 2016 11:48:18 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-290</guid>
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		<item>
			<title>Nan Value</title>
			<link>https://boredomprojects.net#comment-289</link>
			<description><![CDATA[Hi again I've tried to do some quick connections and get a reading but the realPower variable gives Nan in the serial output. I copied the calibration and other values from the emontx board i had, and i didn't connect the AC-AC adapter yet. Is the Adapter necessary ? or it should be giving a value and i'm doing something else wrong? Thanks]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Sat, 13 Aug 2016 21:56:24 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-289</guid>
		</item>
		<item>
			<title>RE: No Serial output</title>
			<link>https://boredomprojects.net#comment-288</link>
			<description><![CDATA[I solved it. Had to put Serial.begin(9600) :)]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Sat, 13 Aug 2016 16:17:23 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-288</guid>
		</item>
		<item>
			<title>No Serial output</title>
			<link>https://boredomprojects.net#comment-287</link>
			<description><![CDATA[Hi I started again with the project and tried to use the due. I got the led to blink and tried your sketch with a breadboard and without the radio board. I've disabled the radio calls in the code, but the led should blink. When it didn't i've put some Serial.println to debug but they don't appear in the seria monitor. Out of the blue do you have any idea why? Maybe some settings on the board? I use the programming port. Thanks]]></description>
			<dc:creator>rjsc2000</dc:creator>
			<pubDate>Sat, 13 Aug 2016 14:07:29 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-287</guid>
		</item>
		<item>
			<title>RE: Seeing a voltage value with the mains switched off</title>
			<link>https://boredomprojects.net#comment-286</link>
			<description><![CDATA[Yep I updated the ADC_BITS to 12 which automatically updated the ADC_COUNTS. I think I've finally figured this out. In my test rig, there is a 40W lamp load connected to the mains with a switch on the neutral line. This is plugged into a mains socket which is controlled by yet another switch. I was getting those strange values when both the switches were open. Since the measurements are neutral line referenced, with the switches open, there is no reference for measurements. When its just the mains switch everything works great and I see voltage values in the range of 0-2V.]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Mon, 11 Jul 2016 20:12:00 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-286</guid>
		</item>
		<item>
			<title>RE: Seeing a voltage value with the mains switched off</title>
			<link>https://boredomprojects.net#comment-285</link>
			<description><![CDATA[Hmm, I'm not familiar with CC3200, so can't really help there. But you are correct to modify SUPPLYVOLTAGE to 1467. A few things to watch for: * EmonLib_3PH.h defines ADC_COUNTS constant. Make sure it is set correctly to 4096 (for 12-bit). * PHASE2 and PHASE3 constants are highly dependent of CPU speed, so you may need to modify them dramatically. * Since your ADC range is only 1.467V, you have to adjust resistors in conditioning circuits for all current and voltage inputs, to center the signals in the ADC range as well as to ensure no signal clipping.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 11 Jul 2016 13:50:57 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-285</guid>
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		<item>
			<title>Seeing a voltage value with the mains switched off</title>
			<link>https://boredomprojects.net#comment-284</link>
			<description><![CDATA[Hi, thank you for all your help with my earlier comments. I finally built this and here are a few observations. I see voltage values of around 51 even with the mains switched off. I also see that the power factor values are negative and the phasecal param seems to have no effect on the output values I see. I'm using a CC3200 MCU which has a 12-bit ADC which can tolerate only upto 1.467V on its ADC inputs. This would mean that the entire 12-bit range covers 1467mV and hence I changed the SUPPLYVOLTAGE values to 1467 in the source files. Am I correct to infer this? Also any thoughts on the voltage even with no mains and the negative power factor values? The load is a 40W incandescent bulb. A measurement file with the values is here: http://pastebin.com/ysHgAG5p.]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Mon, 04 Jul 2016 14:02:29 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-284</guid>
		</item>
		<item>
			<title>RE: Use 9v transformer</title>
			<link>https://boredomprojects.net#comment-283</link>
			<description><![CDATA[That's a neat little transformer. Sure, it can work just like AC-AC adapter and no, you wouldn't need any other components. Except, having live AC traces right there on your board might be dangerous.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Fri, 13 May 2016 20:42:00 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-283</guid>
		</item>
		<item>
			<title>Use 9v transformer</title>
			<link>https://boredomprojects.net#comment-282</link>
			<description><![CDATA[Hey, thank you for the great tutorial. Can i swap the 9v AC/AC adapter with 9v pcb mounted transformer (https://store.comet.bg/download-file.php?id=1057) ? In this case, do i have to do add more components ?]]></description>
			<dc:creator>Remix</dc:creator>
			<pubDate>Fri, 13 May 2016 13:36:34 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-282</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-281</link>
			<description><![CDATA[Ah got it. Thanks again.]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Wed, 04 May 2016 19:35:59 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-281</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-280</link>
			<description><![CDATA[I arrived to these values mostly through experimentation, while monitoring measurement results with a resistive load. But here is a nice tool that can help you get the right values: https://openenergymonitor.org/emon/node/2054]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Tue, 03 May 2016 06:30:39 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-280</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-279</link>
			<description><![CDATA[Another quick Q: How did you calculate the phasecal value as 1.7? I read through OEM's phase error correction but I did not quite understand that (and the explanation on this towards the end of the CT and AC power adaptor calibration theory).]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Sat, 30 Apr 2016 05:53:01 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-279</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-278</link>
			<description><![CDATA[Got it. Thank you for that.]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Wed, 27 Apr 2016 11:21:48 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-278</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-277</link>
			<description><![CDATA[Thanks for the schematics. Very interesting! As for your question, 0.996 is just a ratio, taken from original EmonLib, part of the high pass filter implementation, in order to remove DC component. Here's some explanation: https://openenergymonitor.org/emon/buildingblocks/digital-filters-for-offset-removal]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Tue, 26 Apr 2016 18:52:26 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-277</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-276</link>
			<description><![CDATA[Here is the schematic which is essentially a smart plug reference from TI - http://www.ti.com/lit/df/tidrfq8/tidrfq8.pdf. Look at the Metrology section on page 1. There is no galvanic isolation as such. The opamps act as an instrumentation amplifier whose outputs are finally single-ended and fed to the MCU. I'm guessing these serve as some form of isolation between the MCU and the AC mains. Coming back to the code, I needed only the single phase measurement mechanisms which you've listed here in the EmonTxDue.zip file in the description (under "Update Jan 2016" section). Here is where I'm stumped: Line 114 and 118 (from the github 3phase code lib): How does this work? Why is there a 0.996 multiplier?]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Mon, 25 Apr 2016 10:23:31 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-276</guid>
		</item>
		<item>
			<title>RE: Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-275</link>
			<description><![CDATA[Thanks, electrotwelve! I'm curious about your design of the voltage dividers. Do you think you could post your schematic diagram? If you didn't use CTs, how did you manage galvanic isolation between AC lines and your circuit? To answer your question, yes, 366uV per count is correct. I didn't understand which zip file you're referring to. Please look at https://github.com/icboredman/EmonLib/tree/feature/12bit_3phase and let me know line numbers from files over there.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 25 Apr 2016 08:49:17 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-275</guid>
		</item>
		<item>
			<title>Quick question on EmonLib.cpp</title>
			<link>https://boredomprojects.net#comment-274</link>
			<description><![CDATA[Hi, First of all thank your for putting this out here. Its quite fascinating to see how AC power measurement is done right. Instead of the current transformer and an AC to AC voltage transformer, I'm using voltage dividers and a bunch of opamps to measure the AC voltage and current. My processor is TI's CC3200 MCU based on the ARM Cortex M4 processor. I have a couple of quick Qs on EmonLib.cpp file in the zip file you've listed here. My ADC tolerates upto 1.5V input and the listed reference voltage is 1.467V. It has a 12-bit ADC and then the counts would be 4096. Since my ADC tolerates upto 1.5V this means every count corresponds to 1.5/4096? Which is 366.21 uV. Is this right? On line 85: What range is this? Also how is the 0.55 and 0.45 derived? On line 109-112: If I'm using a 12 bit ADC wouldn't the offset extraction divisor change from 1024 to 2048? My offset is 0.7V.]]></description>
			<dc:creator>electrotwelve</dc:creator>
			<pubDate>Sun, 24 Apr 2016 13:42:15 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-274</guid>
		</item>
		<item>
			<title>RE: Sensors A0 bis A10</title>
			<link>https://boredomprojects.net#comment-267</link>
			<description><![CDATA[Hi Georges, I propose we converse here in English, so that everybody could follow? There are 11 CT inputs and 1 voltage input. 12 in total. Inputs #0 to #10 are all the same and all can be used for current measurements. Input #11 is special, to be used only for voltage measurement. In my system I only have 10 CT inputs (not 11), that's why I used data structures only up to emon[9]. I hope this helps.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Mon, 04 Apr 2016 06:52:44 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-267</guid>
		</item>
		<item>
			<title>Sensors A0 bis A10</title>
			<link>https://boredomprojects.net#comment-266</link>
			<description><![CDATA[Hallo, Bin erst jetzt dazu gekommen! Auf dem Proto sieht man A0 bis A11 also A0 bis A9 = Strom und A11 Spannung aber kann man nicht auch A10 einsetzen? Und mit emon[9] hört es auf. Kann man auf Platz11 define NSENSORS 10 auf 11 stellen? Danke.]]></description>
			<dc:creator>Georges974</dc:creator>
			<pubDate>Sun, 03 Apr 2016 14:42:24 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-266</guid>
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		<item>
			<title>so far not too happy with ADS1115</title>
			<link>https://boredomprojects.net#comment-265</link>
			<description><![CDATA[I received my ADS1115 and started some low level tests. Data sheet tells me to get up to 860 samples/sec but all I receive is: 500samples/sec using 1 channel 250samples/sec using 2 channels 170samples/sec using 3 channels 125samples/sec using 4 channels with one ADS1115 connected to my nano just reading input without any calculations and serial.print. Using the ordinary A0 on my nano I receive up to 9000samples/sec! I guess I have to wait for my Due to touchdown from china.]]></description>
			<dc:creator>Michael</dc:creator>
			<pubDate>Thu, 03 Mar 2016 09:14:35 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-265</guid>
		</item>
		<item>
			<title>RE: Proto Shield - manual reset?</title>
			<link>https://boredomprojects.net#comment-264</link>
			<description><![CDATA[Hi Adrian, I can't remember having this problem, but after some research, these guys seem to have it figured out: https://forum.arduino.cc/index.php?topic=256771.msg2512504#msg2512504]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 02 Mar 2016 20:50:15 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-264</guid>
		</item>
		<item>
			<title>RE: 15bit A/D &lt; 3USD</title>
			<link>https://boredomprojects.net#comment-263</link>
			<description><![CDATA[Hi Sensibelchen, This device looks indeed very interesting. Can work from 3.3V or from 5V supplies, high resolution, 4 inputs, should be fast enough for energy monitoring. From reading the docs, it looks like one can attach up to 4 of these devices to a single I2C bus, which would create 16 additional analog inputs! Not bad. I guess you are thinking about increasing number of CT connections? This might be a good way! If you do get to use it in your system, please let us all know about your experiences.]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Wed, 02 Mar 2016 09:05:41 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-263</guid>
		</item>
		<item>
			<title>Proto Shield - manual reset?</title>
			<link>https://boredomprojects.net#comment-262</link>
			<description><![CDATA[Hello, I'm powering the Arduino Due via the micro USB programming port, which wasn't an issue until the proto shield was mounted. Without the proto shield, the Due starts running the Sketch immediately when the USB cable is connected. With the proto shield attached, the Due powers up OK but I see no LED or Serial activity - like it's waiting for something before executing the sketch. Leaving it for a while makes no difference. If I press the reset switch on the Proto shield, the Due resets and immediately starts executing the Sketch, green LED's flashing and outputting values to Serial as expected. Have I done something wrong? Or is there a way of changing this behaviour so the manual reset is not required? I'd prefer if it didn't need manual intervention every time it loses power. Thanks, Adrian]]></description>
			<dc:creator>adrianc</dc:creator>
			<pubDate>Tue, 01 Mar 2016 13:34:36 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-262</guid>
		</item>
		<item>
			<title>15bit A/D &lt; 3USD</title>
			<link>https://boredomprojects.net#comment-261</link>
			<description><![CDATA[Hi there, just wondering: what do you think of the ADS1115 (e.g. http://de.aliexpress.com/item/ADS1115-ADC-ultra-compact-16-precision-ADC-module-development-board/32295327138.html) offering 4 independent A/Ds with 15bit precision for less than 3USD for the arduino. Any feedback is highly appreciated. Sensibelchen]]></description>
			<dc:creator>Michael</dc:creator>
			<pubDate>Mon, 29 Feb 2016 19:56:10 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-261</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-259</link>
			<description><![CDATA[Hi Mack, I'm glad to hear that! Really looking forward to your review of the board. I found a bunch of these connectors on Amazon, for example, 20pcs for 4eur, or so. Just search for: "5 pin 3.5mm socket pcb". Good luck!]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Sat, 20 Feb 2016 10:32:09 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-259</guid>
		</item>
		<item>
			<title>RE: Home Energy Monitoring System</title>
			<link>https://boredomprojects.net#comment-258</link>
			<description><![CDATA[Hi, after following the OEM project for the past few years, and being frustrated by lack of inputs per device, I'm stoked to not only see your work, but the turnkey fabbed format via Fritzing; I'll be ordering one. Any notes/suggestions for this, esp in giving you useful feedback? I have no existing hardware, but am looking to monitor at a main panel, and a branched subpanel, for per-circuit measurements. Probably a 3-4 month project before I have this live. Also not sure which CT connectors would be ideal for accuracy, without breaking the bank.]]></description>
			<dc:creator>mack</dc:creator>
			<pubDate>Sat, 20 Feb 2016 06:36:39 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-258</guid>
		</item>
		<item>
			<title>RE: Atmospheric Pressure ?</title>
			<link>https://boredomprojects.net#comment-255</link>
			<description><![CDATA[ COMMENT MOVED TO: http://boredomprojects.net/index.php/projects/sensors-for-hems]]></description>
			<dc:creator>boredman</dc:creator>
			<pubDate>Thu, 18 Feb 2016 07:12:44 +0000</pubDate>
			<guid>https://boredomprojects.net#comment-255</guid>
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