I think a 3v - 1kV DC-DC conversion will cost you a lot instead you might consider to convert your 3V DC to 3V AC first and then raise the level to 1kV using a transformer.After than you can regulate your 1kV AC to get 1kV DC. In the configuration you specified 10e-6 A current will be delivered to your load and you are not that far from your current range, you can add som= e resistors to degrade the current IMHO. On Wed, Feb 2, 2011 at 3:33 PM, Paul Haggard wrote: > I'm researching a project right now that requires a step-up converter for > DC > ~3v to DC 1kV and the load consumes about 1mW. I'm a mechanical engineer > with limited knowledge about EE and microcontrollers, but I've never deal= t > with a step up converter before. I know that this converter is (somehow) > possible to build because my research shows that this has been done, but = I > do not know if a flyback transformer or switching transistor would be abl= e > to accomplish this without significant power loss. The intended power > source is a pair of AA alkaline batteries. I have never dealt with such > high voltage potentials before and I'm wary to being any testing before I > come up with a strict safety guidelines and a sure way to keep the curren= t > in the nanoamp range. If anyone can suggest potential resources for > obtaining any relevant information, I'd be glad to do more reading; I > simply > don't know where to start yet. Thanks! -Paul > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .