Hi Eric,
Thanks for the input. I am no where near the state where I can design any of these things myself unfortunately - hopefully I will but I still find it very defficult to analyse complex circuits. I am an avid web user and thus find bits and peices everywhere and try and concoct something by putting them all together!
Thats a good way to learn.
Looking at the design you put together I see it only outputted 1 reading hence I thought it wouldn't work with me.
It should be OK, with minor changes.
I also eventually want to run a relay which apparently also sucks a lot of amps.
Not that much suck.!! about 30 to 50mA.
do you think I should still put in a 7805 1A voltage supply for the +5V?
YES