On Thu, 3 Sep 1998, Norm Cramer wrote:

> be the easiest solution (not the cheapest).  I think the cheapest is to
> hack into the radio control transmitter and put EEPOTS on the controls.  I
> could use a PIC to provide a serial to RC interface and control it that way.
>
> Any more ideas?

imho an EEPOT is overkill for this. Radio pots are almost always
referenced to GND or Vdd. All you need is an 8 bit PWM converter followed
by a low pass filter driving a JFET in the well-known linearized
potentiometer configuration. In this case, due to the high Z of the JFET,
a very simple RC smoothing unit will do (probably 2 cells). A PIC can be
programmed easily to output PWM even if it has no internal support for
PWM.

my 2 bits

Peter