Touch delay switch power supply circuit
Source: InternetPublisher:jikai233 Keywords: Touch delay switch switching power supply circuit Updated: 2020/11/20
Touch delay switch power supply circuit
Shown is the touch delay switch power supply circuit. When the hand touches the touch chip, it is equivalent to giving a trigger signal to the base of VT1 to turn it on
, so VI2 is also turned on, and the power supply charges the capacitor cz through VT2. When the charging voltage is high enough, VT2 is cut off, VT3 is turned on, and VT4 is
also turned on. Then it is turned on, and the bulb emits light and illuminates. When the charge on C2 is slowly released, vr3 is cut off. VT4 also cuts off causing the light bulb to go out.
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