Automatic light on-off circuit

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03:34:51

This simple circuit will demonstrate the automatic light on-off circuit. In actual circuit  we use the LDR(light dependent resistor) in place of the Resistor connected across the output led ( yellow colour ).
LDR has a resistance ranges from (33 - 33k)ohms  i.e when light falls on the LDR the resistance of the LDR decreases upto 33ohms otherwise increases upto 33k ohms when we increase  the darkness.
TRY IT YOURSELF: try to increase and decrease the Resistor connected across the output led ( yellow colour ) and observe the result yourself.

published 7 years ago

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