Beginners • Re: GPIO pins false positives due to digital noise on Buttons

Here my proposal on how to wire the system:
wiring.png
Keep the pullup close to the RPI, and twist the wires to the buttons.

I would place the resistors on a proto board, and reserve some space to add low pass filters R-C to be added later.

Resistor are 2cm from the gpio pins already.
Now, I twisted the wires and saw a huge improvement, before I had one noise fluctuations from 1 to 0 every 4-5 seconds, now it's like one per minute and sometimes a couples of minutes without any, so this is really the issue.
To eliminate all noise would you recommend to buy shielded with twisted wire inside?

Note that I suggested 1k resistors, not 10k.

I have 10k on hand right now, but 1K are arriving in a couple of days, do you think 1k could reduce even more noise than 10k?

Statistics: Posted by danilux — Fri Apr 12, 2024 3:32 am

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