On Sat, Oct 11, 2008 at 11:28:37AM +1300, Jinx wrote: The 555 has reasonable drive built > in, and you can add an extra transistor (preferably Zetex) and IR > LEDs. Jinx, would a Zetex transister be prefered over a mosfet with a suitable Id? Matthew -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist