>IIRC, most pics have a recommended programming voltage of 13.5 for MCLR.
> The ICD (original) documents has a simple PWM controlled voltage
>tripler that uses a few transisters, coils, diodes, etc for its
>programming voltage.  I would suggest you spend the extra doller for a
>handful of parts and derive the programming voltage from your other
>power supply (4AA, maybe.)

Do be aware that this circuit is sensitive to the inductor used versus the
drive waveform. If using an inductor with high resistance you don't get the
voltage you expect. :)

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body