WHY give up?
The sensors I bought are not obscure parts as were the parts I purchased(amplifier) from Electronic Goldmine.
I agree, obscure parts are not the best method but sometimes price gets in the way.
Don't give up Pommie, your input is valued as are many other people more knowledgeable than I.
You PIC codes are very interesting for someone such as me who is trying to learn this PIC programming.
The only similar programming I ever did was with a Commodore 64 and a 128
wonder what ever became of Commodore?