On Fri, Jul 18, 2003 at 10:29:46AM +0100, Peter Moreton wrote: > A bit off-topic, but I'll ask anyhow: I have been asked to come up with > a vehicle 'mini-UPS' design Don't car audio enthusiasts just use large caps for this (and to absorb the power drain of big bass hits)? Just make sure that it's on the receiving end of a diode so you don't drain it to power the starter. -- Ben Jackson http://www.ben.com/ -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.