I'm going to need some help on this one. I have a voltage 12v source that can source more than the 10 amps I need (a PC power supply)... and I have an AVR micro controller...
The only thing I'm aware of that would enable this is if I used a relay, or other magnetic/mechanical switching mechanism. But I think that's out of the question because it would be clicking constantly, and super noisey.
How would one accomplish something like this? What type of parts would they use? Would an opto-isolator work (or am I smoking crack?)? Will I need heat sinks/cooling?
My goals here are safety, low cost, and low noise.