I Have a remote that i took apart and i need to "press" the 6 buttons with my arduino.I have plenty of 2N3904 transistors (Intelligent Power and Sensing Technologies | onsemi) could i use these instead of relays? The remote's power runs off a 12v battery.
Is there a question here?
To do it :-
- connect the ground of your device to the ground of the arduino.
- Connect the emitter of the transistor to the ground end of the push button.
- Connect the collector to the other end.
- Connect a 1K resistor to the base of the transistor and the other end to an arduino output pin.