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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
100nF caps go parallel with 330R resistors (see updated schema; updated also previous posts).
Btw, since Espruino PICO's inputs are 5V tolerant, you can also feed the switches box with 5V - which increases noise immunity.
Feeding 5V gives you an option for a nice UX touch: put an LED into the switch line for each switch: it will light up when the related switch is pressed!