Get a microwave, no buttons would be used, at the bottom tops and sides would be tubes of water coolant. the only electrical concept is cerculating the water coolant...that can be done with the microwave plate. this would have to be turning constantly (not much energy....about 1/5 of the energy used...

Depending if you know the hardware of computers or not, this is a somewhat easy job to acheive. It is actually very similar to connecting a stereo to a computer. You would need a connector, a small single peice...you could make on your own...you could steal the color codings from the networking worl...