external supply ground!

[ali ghafoor]

if i have connected some sort of circuit with a micro controller which requires 2 amperes current...surely controller cannot provide this much current..so i use an external supply ..now my question is that can i connect this external supply's ground with controller's ground pin(because grounds have to be common)?? reply please

 

[tpetar]

Yes you can.

Power supply can supply uC and peripherals with common ground, on the same or different voltages.