Bathroom exhaust fan automatic and manual dual-purpose switch circuit
A switching circuit, exhaust fan technology, applied in electronic switches, electrical components, pulse technology and other directions, can solve the problems of unsafe use, waste of electric energy, shorten the service life of exhaust fans, etc., and achieve the effect of saving electric energy
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[0012] Example attached figure 1 In the illustrated embodiment, an automatic and manual two-purpose switch circuit for a toilet exhaust fan consists of a power interface a (1), a power interface b (2), a rectifier integrated block (IC1), an isolation diode (V1), and a step-down Resistor (R1), filter capacitor (C), Zener diode (V2), signal interface (4), bias resistance a (R2), variable resistance (RW), transistor (VT), bias resistance b (R3) ), NOT gate a (IC2), NOT gate b (IC3), isolation resistance (R4), manual switch (Q), NOT gate c (IC4), drive resistance (R5) and unidirectional thyristor (VS) , Where: the two input ends of the rectifier integrated block (IC1) are connected to the power interface a (1) and the power interface b (2) respectively, and the anode of the rectifier integrated block (IC1) is connected to the anode and the single terminal of the isolation diode (V1). To the anode of the thyristor (VS), the cathode of the isolation diode (V1) is connected to the fi...
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