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| date | article | author | comment |
| 05 maa 2021 18:24:32 | Additive synthese waveform generator | Jon | In Safari, the frequency only works right when the page is first loaded. I can change the frequency once. Changes to frequency after that point are ignored. Thank you for this tool. It's great for demonstration purposes. |
| 21 jan 2021 12:55:20 | Additive synthese waveform generator | Freddy | I don't know of an online instrument. But I think a midi keyboard with a Hammond organ simulation will do the trick. |
| 18 jan 2021 17:11:44 | Additive synthese waveform generator | Some user out there | As someone with absolute pitch, this is a very interesting conept to me, I must say. It made me think if you know a website or application out there where you could make your own instruments like this, where you could customize each overtone from the first to however many it takes to get to 20,000 hertz. I am more into music than I am into programming, so that is why I am asking this through a more musical perspective. If you do not have an answer, that is completely fine. |
| 09 dec 2020 20:16:13 | Arduino wattmeter | Janjos | Hi, I adapted the Arduino watt meter code so it runs on a UNO. For those that want to try it before building it, the code can also be tested using SimulIDE (www.simulide.com), together with a ready to use simulation circuit that I draw. Am I allowed to post both files, .ino and .simu, here ? If yes how ? Best wishes, Janjos |
| 30 nov 2020 16:03:07 | Fast Lux meter | Freddy | Yes, the BPW34 is more sensitive, but its spectrum lays more in the near infrared region and does not represents the human eye. |
| 30 nov 2020 07:35:05 | Fast Lux meter | hgg2k | Hi, the OSRAM BPW34 has a listed 80nA/Lx sensitivity. Does this make ~10 times more sensitive to low light than the BPW21? Thanks. |
| 08 okt 2020 09:24:18 | Measurements on a simple power supply | Meseret | I want to now how rectifier ,mosffet ...measure with mesurment equipment |
| 24 sep 2020 09:20:35 | Arduino wattmeter | Guenter2 | Doh, that did not occur to me, it's an AC wattmeter, of course it can measure negative voltages - oh well, feeling pretty dumb now! ;-) \\ Very cool, that little wattmeter is exactly what i needed, thanks for sharing!\\ Best regards,\\ Guenter |
| 24 sep 2020 09:04:09 | Arduino wattmeter | Freddy | You don't have to modify the circuit. The wattmeter can measure negative voltages. Connect the current measure side so it measures also negative. The result is a positive power measurement. |
| 23 sep 2020 21:10:31 | Arduino wattmeter | Guenter | Hi Freddy, cool project! I have a question - i need to measure the current on the high side of the load - how would i have to alter the circuit to implement this? I thought of disconnecting the common lead from the voltage measurement part of the circuit, and providing the 0.55V offset (half of the reference voltage) for the positive input of the opamp with its own resistor divider. The voltage measurement would stay the same - except it has no common connection to the current shunt. Does that make any sense? Could that work this way? Thanks, Guenter |