Photodiode Controlling LED Feedback Circuit

Hi everyone!

I have a circuit I need to design using analog components for a project. It's devised into two parts:

1) LED driver circuit which provides light to the photodiode 2) Photodiode feedback circuit which varies the current driven to the LED

I essentially want to design a circuit where a Red 2.5V LED is pointed at a 3V Max photodiode and the photodiode controls the brightness and dimness of the LED in a closed-loop feedback system. So if it is bright outside, the LED dims, and if it's dark outside the LED brightens. Possibly a switch can be added to turn the circuit ON/OFF. I think a dark sensor can be used. It sounds easy, right?

Please help with a schematic for each circuit. All ideas are welcomed with a schematic. I love this place!

Thank you!

by miorio
June 24, 2022

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