Difficult to assist, as measuring voltages in your setup can't be done from my desk.
Usually there is no 'connection' between GPIO and USB on a RPi.
I would add an optoisolator between the coin detector output and the RPi GPIO. This also removes the GND connection between coin detector/power supply and RPI GND . Then check if this improves the situation.
Usually there is no 'connection' between GPIO and USB on a RPi.
I would add an optoisolator between the coin detector output and the RPi GPIO. This also removes the GND connection between coin detector/power supply and RPI GND . Then check if this improves the situation.
Statistics: Posted by ghp — Thu Jan 23, 2025 7:29 am