Hi guys, I'm working on a project where I made a led display with three faces (sad , neutral , happy). To show a face I made a keypad from scratch with aliminiumfoil and paper. My idea was to make 1 attachement to the keypad an output(high) and if a smiley is pressed the foil would touch each oth…

smiley led display with home made 1x3 keypad // problem

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