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motor headlight auto-changing controller(II)

2016-09-02 10:43  
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motor headlight auto-changing controller(II)
 Principle of the circuit   The motor headlight auto-changing controller circuit is formed by the optical detection circuit,control implementation circuit and LED indication which is shown in figure 7-2.  Photoelectric detection circuit is formed by the photosensitive resistor RG,resistors R3-R5,capacitor C and the potentiometer RP.   Control implementation ircuit is formed by the electronic switching integrated circuit IC,resistor R2,diode VD and relay K. LED indication circuit is formed by resistors Rl and color-changing light-emitting diode VL.   S1 is the switch of vehicle key, S2 is the vehicle switch of turn light.