Peter Todd wrote: > Total current draw averages about 22A-25A but can peak as high as about > 40A. Not that I am totally sure about those numbers, [...] It's not quite clear what you mean by "peak", but it sounds as if that could be peaks of more than a few milliseconds. If that's the case, a power supply designed for 28 A may or may not help you. I'd try to buy one. Other than that, you can go simple linear (with big heat sinks), switched (which probably is not trivial for 40+ A), or linear with several parallel supplies that get switched on or off as the current requires. Or something else... :) > As mentioned in another post, 100000uF, no surge prevention. That could cause quite some inrush current. (BTW, there's "milli", too: 100 mF is easier to read :) Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist