Hello, i'm trying to hack the play/pause button on an MP3 board (image below), so that i can control the play and pause from and arduino pin. this pushbutton just grounds a pin of the main chip, which voltage is 3.3V. i welded a wire to the 3.3v side of the pushbutton and tried to mimic the pushb…

[image] abaratar-costes: whats the difference that make NPN work in my case and the other not? The NPN is in a common emitter configuration, the PNP is in a common collector configuration. In this case, the important difference is that the common emitter configuration does not place the trans…

Hacking pushbuttons

Other Hardware General Electronics

J-M-L September 19, 2021, 10:41pm 2

Use an optocoupler or reed relay may be?

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Hacking pushbuttons

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