I'm using a PIC16F628 powered by 6V lithium batteries (KL2CR5).
When new their open circuit voltage is 6.5V.  The max Vcc in the
specs for a 628 is 5.5V.  I use two 1N4007 equivalents to drop the
battery voltage down to below this.  Does anyone ignore the spec
and use just one diode or no diode at all?

I didn't use a switching supply because I was pushed for time.  The
device has to last 5 years on a battery and I didn't want to spend
time calculating which would be the best solution.


Paul Gaastra      email:pgaastra@hortresearch.co.nz
BioEngineering Technologies, HortResearch
Private Bag 3123            phone +64 7 8584745
Hamilton, NEW ZEALAND         fax +64 7 8584705


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