I will check out the flyback and sepic Ics. It would be wonderfull to = have an IC that accepts the voltage range 3-30 and outputs 3V (or 5V)=20 =D6mer Yalh=FD oyalhi@teksan.com.tr -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.