On Thursday, Mar 18, 2004, at 09:39 US/Pacific, Clint Turner wrote:
>
> The workaround was to use 3  cheap red LEDs in series - yielding a bit
> over 5 volts.

yeah, it's a bit surprising that no one has mentioned that with todays
logic families, you hardly need any regulation.  A typical 2.0-5V PIC
should operate fine over the entire useful life of 3V, 3.6V, or 4.2V
batteries.  If you need a more highly regulated voltage for A-D
converter or something, the PIC can turn that on as needed, and the
power budget for THAT need not be so tight...

BillW

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