At 09:32 AM 2/21/02 +0200, Vasile Surducan wrote: > However, two transistors for just driving a bulb is too much ! >The problem was already solved more than 10 years ago ( in the same way >like magnetron filament current limiting inside any domestic oven ) by >using a simple high loose magnetic core suply transformer. You are right. But consider this: Dale already has a suitable transformer. We buy IRCZ24 FETs in thousands - they are less than a dollar each. I expect IRZ44 FETs to be not much more. Bottom line: the FET idea is a simple, inexpensive way for Dale to electronically control his lights. dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 18 years of Engineering Innovation (1984 - 2002) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads