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From: Jan Panteltje on 10 Dec 2008 06:18
On a sunny day (Tue, 09 Dec 2008 20:15:41 -0500) it happened RFI-EMI-GUY
<Rhyolite(a)NETTALLY.COM> wrote in
<493f182e$0$4927$9a6e19ea(a)unlimited.newshosting.com>:


whatever 470 supply 5V
---- R1 -------- R2 ----- PIC in.
|
zener
| 5.1V
///

For a lower voltage PIC supply use a lower voltage zener.
R2 limits the current during search via the PIC input protection diodes.
Circuit sort of works for me (zero failures in 10 years) with some other chips.

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Next: Ultra-simple discrete 10W audio power stage for guitar use - would this work?