Automatic door detection control circuit
Source: InternetPublisher:containsmachine Keywords: control circuit automatic door detection Updated: 2020/02/05
Shown is an automatic door detection control circuit . The circuit is mainly composed of Doppler effect sensor ICl (RD627A),
voltage comparator and light-emitting diode. RD627A is equipped with an oscillator, transmitter circuit, Doppler Amplifiers and detector limiters and other circuits.
It is located in the warehouse for anti-theft detection. When working, the microwave signal is emitted by the antenna and then reflected back through the door. If the door is opened,
the changed emission signal will be detected, and pin ⑦ will output the detected voltage signal. This signal will be output to high level through LM393 and light up the light-emitting diode.
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