For those of you wanting to drive a White LED of a single NiCad NiMH cell you may care to look at this Application Note http://www.zetex.com/3.0/appnotes/apps/an33.pdf 8Watt Fluorescent Lamp Inverter http://www.zetex.com/3.0/appnotes/apps/an1.pdf and although it's a bit off topic for those of you interested in Infra Red Communications http://www.zetex.com/3.0/appnotes/apps/an3.pdf Regards Chris Carr -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.