Procedure:

We will assemble the light sensor circuit on the circuit trainer.

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Step 1:

• Hook up the components on the circuit trainer.
• Set the power supply to +9V DC.

• Plug in the circuit trainer and set the pontentiometer until the photoelectric cell reacts to the movement of your hand.
• When the photoelectric cell is exposed to light, the LED should light, when you cover it with your hand, the LED should go out.
• If you reverse pins 2 and 3 of the LM324, the light will go on when it is dark and go out when exposed to light.