Thanks Maarten. I will look back at how did elcheapo
elevated the voltage to 13.4v. If one has the
resources, building an ICD2 clone is a good solution
for home made programmers. 

john

--- Maarten Hofman <cashimor@gmail.com> wrote:

> > Does the parallel port guarantee the minimum
> voltage
> > for programming a PIC,12.5v?
> 
> 
> The El Cheapo has very clever power supply
> circuitry, and does not depend on
> the parallel port for this power. It uses a walwart
> of 16V to supply its
> current, which is regulated to 12V using a 7812 and
> artificially elevated
> using two diodes to 13.4V, which suits the entire
> range of PICmicros it was
> meant to program. See
> http://www.myke.com/elcheapo.htm for all details
> (although, as said, it is probably not the wisest
> choice if you are going to
> build a programmer).
> 
> Greetings,
> Maarten Hofman.
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