The electric timer circuit of ceiling fans

Published:2011/6/4 6:53:00 Author:qqtang | Keyword: electric timer, ceiling fans | From:SeekIC

The timer circuit consists of the power supply circuit, time delay control circuit and single steady trigger control circuit, see as figure 1. In the circuit, the power supply circuit consists of the power supply switch C1, releasing resistor R1, voltage steady diode VS, rectifier diode VD and filter capacitor C2; the time delay control circuit consists of the NPN V, resistors of R2 and R3 and the capacitor C3; the single steady trigger control circuit consists of timer selecting switch S2, capacitors of C4 and C5, the time-based integrated circuit IC, resistors of R4-R8 and thyristor VT.



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