Hi guys

thanks for the tips.
The adc jumping was sorted out by putting the cap closer to the 7805 regulator.
A Tantalium cap also improved stability. so for good measure I ised both.

I also tried ceramic caps but they didn't make any difference.

The ADC range adjustments seem interesting, still working and experimenting with that one.
Math calc's don't always seem to be spot on.??? ( maybe it's back to school).

Regards
Wilfried