I've considered using 4 simple direction buttons to control the camera, but
then, I may as well do away with the PIC84, and servos, and just have 2 axis
DC motors.
Though I may resort to doing it like that (the wedding's in less than 2
weeks!!), I really want a bit more control.

Using a 555 would be okay, but the circuit to set that up uses an RC to set
the frequency of the PWM, which then would be measured with the PIC.  Surely
I can cut out the 555 and just use the Cap and variable resistor?


Thanx Jinx, I'm studying your design (without the 4017!)
http://home.clear.net.nz/pages/joecolquitt/0pots.html

Could you give me some quick help on a rough outline of events?  I've tried
here:


   VAR1               |-------------|
    /\/\/\------------> |RA1-------|
      ^                    |-------------|
      |                     |---PIC-----|
      |                     |--16F84---|
      |                     |-------------|
      |---/\/\/\-------->| RB1------|
      |                     |-------------|
     =  CAP           |-------------|
      |
   GND


**********
Initialise
Discharge cap (shorting contacts? - Both RB1 and RA1 low?)
RB1 high
Start Timer
Keep checking RA1 until it goes high
Store Timer Result
****************

Andy Brinkley

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