On Mar 17, 2006, at 11:03 PM, Vasile Surducan wrote: > So you need a binary controlled resistor for a 2^n > levels of brightness. > Can't you just do the brightness via PWM, even without any resistors? BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist