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Published 9 years ago • verified publisher icon olewolf

Sample/Serial comms Noise

Open neonascent opened this issue 5 years ago • 3 comments

Hi Ole - I love the project, and really appreciate your time putting it all up!

I'm having some issues with noise from the system. It's all harmonics of 60Hz, and I can't tell if it's electrical noise from the serial send every second, or possibly a sampling artifact?

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It gets a bit less noisy if I use 12v power for the Arduino; maybe my capacitor choices are incorrect?

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Any suggestions would be appreciated

neonascent avatar Oct 28 '20 17:10 neonascent

Ah I have realized I have put an LED where there should be an inductor! But what value of inductor? It's not labelled on Schematic or PCB file.

neonascent avatar Nov 02 '20 13:11 neonascent

The inductor is just a coil intended to suppress noise. I'm relatively sure you omit the inductor (that is, just short it) so you can use JP3 to select 5V or 3.3V.

olewolf avatar Nov 02 '20 13:11 olewolf

Thank Ole - I'd love to take advantage of a coil to suppress some noise, but I don't know what a good value would be. What inductance / Henries value would you suggest?

neonascent avatar Nov 05 '20 08:11 neonascent