Hi guys,

My PIC Start Plus stopped working a week back and I decided to construct =
a home made programmer for programming 16f877s. I checked the PicList =
pages and I could not find a single schematic for a 16f877 programmer ! =
almost all the programmers were for 16F84.

So, I decided to construct my own programmer. And I set out. I took =
David Tait's TOPIC as the reference design.

TOPIC uses a LM 317 to get the high voltage (12 to 14 volts as Microchip =
says). I want to use a 7812  12 volts regulator instead of a 317.

When I checked the output of a 7812 in an existing circuit with a DMM, =
it showed 11.9 volts.=20

Now, my question to the experienced gentlemen on PicList is weather I =
can program a PIC using  11.9 volts for the VPP
(Programming voltage) ?

Regards,

Jeethu Rao

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