Are the pins floating? Did you ground the pins to see if they read 0?
When I use the Analog pins for A:D conversion. I read 2 pins. Say A1 and A2 ( this pin grounded). I then, before doing any math do (A1-A2) to get rid of any 'noise.'
Are the pins floating? Did you ground the pins to see if they read 0?
When I use the Analog pins for A:D conversion. I read 2 pins. Say A1 and A2 ( this pin grounded). I then, before doing any math do (A1-A2) to get rid of any 'noise.'