> come from 200x HV diodes and 200x flash transformers > driven by cheap rugged transistors. Ah, Roman and his wonderful parts distributers... Where exactly did you say you could get these cheap flash transformers? I know that for one or two you can raid your local photo processor for disposed disposable cameras, but I'd hardly want to unsolder 200+ for a project... I always assumed that these were custom-manufactured for the disposable camera industry, unavailable to mere mortals (but I wouldn't mind having a source, even for traditional flash-like projects (I really do want a microcontroller sequenced multi-flash unit...) BillW -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics