Hi, I would like to use a transistor to disconnect the DFPlayer mini when the arduino pro mini 3v is not using it, to avoid consomnsion. I use a transistor PN2222 and 1k resistor. But it doesn't work. When the pin 12 is high i have 0v at the pin when the DFPlayer mini is connected. But when he i…

Pin 0V when i use a transistor

wvmarle November 22, 2017, 7:02am 4

Please post your code.

Symptoms perfectly match a pin that's set to INPUT, pull-up enabled.