Automatic Headlight Brightness Switch
by Himanshu Mehta, Clemson Automotive Engineering Graduate Student
The video below demonstrates the working of a simple Automatic Headlight Brightness Switch
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The Circuit Board (Top View)
The Circuit Board (Front View)
Part List:
- (R1): 5k 1/4W Resistor
- (R2,R3,R4): 10k pot
- (T1): NPN Phototransistor
- (T2): 2N3906 PNP transistor
- (D1): Low Current 12V SPST Relay
- (D2): High Current 12V SPDT Relay
- (S1): SPST Switch
- (Ba): Battery
- (Miscellaneous): Bread Board,Wires,Light Bulb,Lamp Base,knob for pots.
Schematic Diagram of the Circuit
Pin Diagram of Low Current 12V SPST Relay
Pin Diagram of High Current 12V SPDT Relay
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