>
> For quite a time I had an idea to do a PIC based interface between
> a R/C Tx and PC using a game port. I do not quite understand how
> it can be done. The game port needs a POTENTIOMETER to be
> connected to an input pin rather then feeding in a voltage level, wright?
> So could you give me any idea of how a PIC can emulate a potentiometer?
> ( Sorry for possibly a naive question - I am not an EE).
> Thanks,
> Arkady Skorokhod.

I am not an EE too, sorry. The potentiometer (approx 100k) is connected
to +5v. May be a programmable current supply will work. Its parameters
should be, I think, 5v/100k=50ua to 500ua stepping 1ua of output current.
This could be a DAC or even a set of resistors attached to +5v by p-n-p
transistors, being controlled by PIC. (Well, could anybody on the Globe
point me to a good source for learning English grammar, my native is
Russian).



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        \/          Mike Singer, Ukraine.

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