At 09:20 AM 8/17/2009, alan smith wrote: >I have an application where I need to burst out up to 3A at 7Vish >for 10mSec, so either using some AA in series, or a 9V. The >question I am trying to determine is how much burst current I can >get out of a battery before it gives up. I was also thinking >perhaps using some sort of capative disharge circuit. The burst >itself will be gated using a FET. What amount of voltage sag can you tolerate over the 10ms period? We make little hand-held pyro initiators that operate from a 12V key-fob battery. What makes them work so well is the large low-ESR capacitors we have in parallel with the battery. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist