On Wed, 25 Nov 2009 15:58:10 -0500, "Herbert Graf" said: > > You know, that's a really good question... perhaps they have two "big > caps" and a switch that switches to the second cap after the first > flash? That's what I was thinking. I could reuse the trigger and charge circuitry(plus a rectifier for each cap), and use the flip-flop to alternate the two caps. I wonder how much current I need to plan for? It would be nice to use MOSFETs for the switches so I'm not burning up base drive on a bipolar/darlington, but 400V devices have pretty high Rds. I guess I'll have to try to measure the peak current (without getting shocked too many times). Thanks! Cheerful regards, Bob -- http://www.fastmail.fm - The way an email service should be -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist