Circuit controlled by light touch switch
A switch control circuit, light touch technology, used in electronic switches, electrical program control, program control in sequence/logic controllers, etc.
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[0015] Do further expression below by specific embodiment:
[0016] The drain of the PMOS transistor Q1 is connected to the positive pole of the power supply, the source is connected in series with the resistor R8, the high-power LED is connected to the ground, the gate is connected in series with the resistor R5 to the collector of the NPN transistor Q4, and the resistor R1 is connected between the gate and the drain; NPN The base of the tube Q2 is connected in series with the load circuit connected in parallel by the resistor R2 and the capacitor C2, and connected to the collector of the NPN tube Q3, resistors R7 and R9, the collector series resistor R6 is connected to the positive pole of the power supply, and the emitter is grounded; the NPN tube Q3 The base is connected to capacitors C1, C3, and resistor R4, of which C3 is grounded, and the resistor R9 and tact switch SW1 are connected in series between the collector and the base; the base of NPN tube Q4 is connected to re...
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