Circuit for Photoresistor

[milov72]

Hi! I need some help with a circuit for a photoresistor.

I need to measure the distance to a light source ( 50 cm) with a photoresistor. I need to use an OP amp and i have to calibrate the circuit ,
so the surrounding light is 0V. Thanks!

 

[IanP]

Hi! I need some help with a circuit for a photoresistor.

I need to measure the distance to a light source ( 50 cm) with a photoresistor. I need to use an OP amp and i have to calibrate the circuit ,
so the surrounding light is 0V. Thanks!

I think photoresistor is not enough "intelligent” to tell you about the distance to the object. It can give you information related to the average light to which t is exposed, without details such as where the light is reflected off.
And details is what you need ....

However, here are some circuit that you can use in experiments to prove or disprove this idea:
https://www.eleccircuit.com/light-meter-circuits/

:wink:
IanP