Hi All, I want to use my car battery to provide a range of variable d.c. from 0-12V, but a standard regulator circuit doesn't fulfill the requirement, as I want the output voltage to be adjustable by software through a microcontroller, could someone suggest how to do that? Thanks in advance! John _________________________________________________________________ Add photos to your messages with MSN Premium. Get 2 months FREE* http://join.msn.com/?pgmarket=en-ca&page=byoa/prem&xAPID=1994&DI=1034&SU=http://hotmail.com/enca&HL=Market_MSNIS_Taglines -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads