Hi all Has anyone worked on a system using PWM to create a SMPSU where the PIC/MCU= supply is being generated from the PWM. I know this will need a bootstrap = mechanism and I guess that is what I am most interested. Thanks Veronica --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .