On Thursday 06 February 2003 02:04 pm, you wrote:
> > This does work but maybe I've explained it wrong ... I'll try to
> > draw the schematic in paint.
>
> If the D and R were in series it would of course work, but then why
> the diode?

I think he is applying the high voltage to a pin between the diode and=20
the CPU, reverse biasing the diode and preventing the high voltage from=20
leaking into Vcc.  In non-programming operation, the ICSP pin is left=20
disconnected.

I believe that's right.

michael

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