Automatic Parking Light Switch Circuit

Black 1 Gang 1 Way Wireless Touch Screen Light Switch 86

This automatic park light switch with LDR automatically turn on the sunshine when the encircling light dims to a preset level. The primary circuit diagram is an NPN design intended for negative grounded chassis. The second diagram is the PNP version intended for a positive grounded chasis.

The dim level at which the circuit activates is set through the potentiometer P1.
The printed circuit board layout can be utilized for both the negative and positive polarity chassis. Take note that the transistors and different for each chassis type.

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