Comment summary #21
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Comment 201 ... 210
| date | article | author | comment |
| 28 sep 2016 12:39:07 | Arduino wattmeter | BSEE TUP Manila 03 | Hello Freddy, I have a problem with my lcd. it only shows a block of character in the bottom line of the LCD. I already check the connections from the lcd to MCU. but still same problem. what do you think is the problem? Another question. how can I use a 4x20 lcd for this wattmeter? I just want to show Voltage, Current, Power and Power Factor and remove the pushbuttons for fixed parameter display. thanks in advance :) |
| 25 sep 2016 09:42:21 | Arduino wattmeter | Freddy | Sorry BSEE, i'm a little too busy right now. I can't write code just for a single specific application. |
| 24 sep 2016 23:15:47 | Arduino wattmeter | BSEE TUP Manila 02 | Hello Freddy, thanks for the reply. btw I am planning to use this project for my 3 phase voltage regulator. how can I add a relay module to this project? I want to use the data collected from to maintain a 230 volts output in a 3 phase transformer bank by controlling the relay (use to change the tapping sequence in a transformer). can you provide me a code for this? I'm planning to make 3 of this. to measure a 3 phase system. |
| 30 aug 2016 21:23:29 | Chinese peltier coolers | Miguel | Two heat pumps series connected very inefficient and no real simulation of a thicker Peltier module, then the faces are ceramic (no good thermal conductivity) and not well suited to stacking from thermal perspective |
| 30 aug 2016 10:41:05 | Arduino wattmeter | Pravin Joshi | How to design net-watt-meter to keep track on AC power used and supplied DC power from Solar panel. |
| 23 aug 2016 23:51:34 | Arduino wattmeter | Freddy | @amin, you could add the power factor yourself if you wish: The real and apparent power are already calculated. For a THD calculation there is not enough calculating power and memory available. @Wolfram & BSEE copper has an too large temperature coefficient. If there is no other option: use a ten times as large resistive value for the shunt and use a constantan resistor. You can discard the opamp circuit. |
| 19 aug 2016 08:18:23 | Arduino wattmeter | amin | hi dear freddy your project is very good. just can measurement PF(Power factor) and THDv and THDi? you can add this parametr to your project? |
| 17 aug 2016 11:13:04 | Oscilloscope probes | Alfred Paar | Hi, what magnetic field sensor is used in Fig. 11? There is a bridge circuit shown, but I do not understand why. BR, Alfred |
| 07 aug 2016 09:31:24 | Arduino wattmeter | Wolfram Fischer | you can use a thick piece of copperwire and calibrate that. |
| 26 jul 2016 02:52:33 | New wattmeter project | Brian | I wish you a speedy recovery then. You and I are far away (I'm in Canada) but I'm currently out of work and have time and would be able to help out if you can work with a non-local partner. I'm an older engineer, and I have been working with electronics since I was 12, from 1976. I have plenty of experience in analog, digital and PCB design, C, C++, assembler, python, many more... and I can probably offer some early feedback, design suggestions and/or help with programming or design work (For professional work I've used Racal-Redac, Mentor PADS and Cadstar, but for my own projects I've been trying to use KiCad lately). Anyways, I'm happy to help out if I can, in any way you see fit. You can contact me in email directly for follow-up. Cheers! Brian |