On 16 Jul 2004 at 21:50, Russell McMahon wrote:

> >> Looks like we could use this one:
> http://elm-chan.org/works/avrx/avrxp8.png
> >> Only special component required would be the pre-biased transistors or
> use
> >> resistors with transistors.
>
> > Does that work with devices like the ATTiny11 that need high voltage
> > programming?
>
> The schematic shows it having a switched 12v supply to the reset line, so
> YES.
>
> Add 4 resistors - one in each base connection, and almost any small signal
> NPN or PNP transistors as appropriate would work.  I'd use BC337 / BC327 but
> YMMV.
>
>         RM

        I used BC547 and BC557 and a 78L05 for the +5V. The base resistors
are in the schematic. The software is the AVRXP.COM that runs in a DOS
window. It is a command line program and can be called as a TextPad Tool.
        The windows version, AVRSP.EXE don't work with the parallel
programmer, but the C source code is available.

        Mark Jordan

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