Any electronics nerds interested in Arduino/Atmel?

[franken]

Originally Posted by dmjlambert

Well I don't know about PWM for AC, I think it is for DC motors only, but I may be mistaken. It will be interesting to find out how it goes.

Look into a triac for AC PWM... https://www.google.com/search?ei=6ko....0.okNKgaixWr8

As for BJTs vs FETs they use a bit different terminology but the basic difference is the former operates on base current, and the latter on gate voltage. FET tech typically uses less current and higher voltage.