Joystick reproduction (RC transmitter)

[Dan Roganti]

Bill Sudbrink wrote:
> +12V on one end, -12V on the other and the center tap goes
> back to the A to D card.  The test procedure specifies +2V
> and -2V at the full deflection of the stick.
>
>   

Bill,

After looking at my copy of the D+7A schematic, you probably could get 
away with using joysticks pots which are higher in value, say 10Kohms. 
Looking at the 4051 mux datasheet, the input current required is 
minuscule, measured in the microamps, which should make it still 
possible to use joysticks with a little more resistance.


=Dan