Reading Analog Reference Value

Projects Programming
1

Howdy,

I'm interested in reading the value that is being sent to the analogRefence() pin. I could do this using another one of the analog pins but is there a way to accomplish this without using another pin?

read = analogReference();
read = analogRead(analogReference());

New to this game, trying to find a trivial solution to this problem and searching the forum hasn't turned up anythign results.

Thanks,
Ag

2

The analog to digital convert works by comparing the input value to a reference value, so reading the reference value should produce the maximum possible result of 1023.

You can, however read an accurately known input value and use that to deduce the actual value of the reference.

3

That all makes sense now that you say it. Ha, I could see me (if it was possible) reading the value and getting 1023 every time and getting very frustrated.

Thanks for the enlightenment and pro tip.

Ag