555 toilet floodlight and ventilator automatic control circuit


Posted on Feb 7, 2014

The electronic switch is composed of the CK-4 type magnetic control switch and the VT1?R1?R2. When the bathroom door closes, the permanent magnet ZT and the reed pipe GA get close to separate the two touch tablets of GA, VT1 cuts off, pin-2 of IC has the high level voltage, 555 is in the reset state, J releases, the ventilation fan and light has no power. Wh..


555 toilet floodlight and ventilator automatic control circuit
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