Darkness sensor circuit

Darkness Sensor Circuit| Light Sensor Circuit| Simple LDR Circuit -by Manmohan Pal

This is a simple Darkness sensor circuit made by using a single NPN transistor  BC 147/547 and a LDR with one 100 K Resistor,

The circuit can be used to make Automatic street lights, Automatic car headlights, Automatic Garden lights etc.


Circuit Diagram:
http://electronics4ubymanmohanpal.blogspot.com/2018/08/darkness-sensor-circuit.html

Components required to make a Simple LDR circuit are

NPN Transistor BC 147/547
LDR
100 K Resistor
12 Volt LED Strip
9 Volt Battery
Battery Connector




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LED Flasher Circuit
http://electronics4ubymanmohanpal.blogspot.com/p/led-flasher-using-transistors-only.html


Dark Sensor Circuit
http://electronics4ubymanmohanpal.blogspot.com/2018/08/darkness-sensor-circuit.html