I have a power bank that I have remove the push button to turn on and off. The power bank turns on when I short both leads from the button and off when I short them again.
I measure the voltage across both leads from the button and it measures +3.5v when off and -2.7v when on. The polarity reverses, I put a 10k resistor across to sort of make a short and it works. Basically it don't need heave duty stuff. Note: It is a push button, not a switch.
Can I use an external MOSFET that it will be controlled by and external Arduino and if so, how can I hook it up?
I was thinking in sending a pulse to a relay to short the button leads, but I'd like something more reliable like a MOSFET or other neat things I might not know.
Keep it simple folks, and Thanks!