> TO220s. If your motor has a fan and you can duct the intake > over the transistors it will help cooling a lot If it hasn't got a fan you could make one out of just about any sheet material, as long as it gets the air moving. Even eg high power audio amps with huge heatsinks (and room to add more) employ at least one fan -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body