wt200999
Newbie level 1
I came up with a circuit for sensing light using a photoresistor and a 741 Op-amp. Here is my circuit diagram. (sorry for the crude drawing)
With a power supply at +5v The output I get from the op-am I was expecting to be either 5v or 0v, but instead I get ~4.5v and ~2v for either light or dark. I eventually wanted to interface 3 of these to inputs on 7400 series logic.
With a power supply at +5v The output I get from the op-am I was expecting to be either 5v or 0v, but instead I get ~4.5v and ~2v for either light or dark. I eventually wanted to interface 3 of these to inputs on 7400 series logic.