CompuServe Messages

Each pot needs to be about 750k ohms max resistance; buy 1M ohm pots and add a fixed resistor in parallel. Connect them from the +5 volt supply pin to the appropriate X or Y signal pin. The software will discharge a capacitor to ground and count how long it takes to charge back up. Over here in the States, we get analog return values of 0 – 511. But this is actually the video line number of when the analog value reached its threshhold. In PAL/50Hz territory, your results may differ. Bruce