Do you add amps together?
I guess I don't understand how amp ratings work. I want to use a 12v 5a power supply for a peltier plate. I am using a 2" cpu heatsink with a small fan attached to cool it properly. I tried it with a 9v battery and it worked but I want to use an AC to DC wall psu. The fan is 12v 0.12a. Do you add the amps together (5.12a) for the total? If so, does that mean a 5a psu is not enough? I don't want it to be too low and draw too many amps and damage something.