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'[OT] white LEDs --- Caving Lamp Details'
1998\10\28@112535 by Craig Lee

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Electronics Now, June 1998, Page 20, Figure 3.

Using 20 medium beam and 5 narrow beam. Output to the LEDS is 3.6V,
with 5mA for each LED(maintaining that they are most efficient at this
point).
Driving with a 2.8V 8AH Lithium Ion Battery.

He even suggests using a small PIC as an alternative to a Maxim regulator.

I was going to build one if I got time, as I get so angry when I replace a
bulb,
only to have the filament break 10 minutes later..

Craig

{Original Message removed}

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