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The car electric igniter (4)

2017-01-17 23:10  
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The car electric igniter (4)
Here is to introduce the car electric igniter which adopts the photoelectric triggering method, and its feature is that neither of the trigger signal nor the closing angle is affected by the engine rotating speed. The working principle of the circuit The car electric igniter circuit consists of the photoelectric trigger, amplifier circuit and switch booster circuit, see as figure 7-135. The photoelectric trigger consists of the blanking disc (located between VL and VI, not in the figure), resistors of R1 and R2, infrared LED VL, infrared light sensitive transistor V1 and so on. The amplifier circuit consists of the transistor V2-V5, regulated diode VS and resistor R3-R6 and R8.