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I have been looking for people that built LED flashlights and all I can find is single LED flashlights. I wanted to know if I any one knew a site that talked about a multiple LED flashlight? It would be good if they had a schematic to.
The best schematic for a LED flashlight that I've seen so far was published by www.elektor-electronics.co.uk
in the november 2002 edition.Sadly I am not allowed to upload the article due to copyright restrictions. You could try asking them for a copy though.
What I can say though,
Some of best LEDS you can buy are made by a company called Nichia (japan) ref NSPW 500BS [6400mCd!]
Maxim make a couple of ic's for driving leds, though a PIC microcontroller might be more usefull especially if it has an A/D converter (12c672) so u can monitor battery voltage and use this info to control the voltage converter.