Cable anti-theft alarm circuit
Source: InternetPublisher:smallembedded Keywords: Cables anti-theft alarm circuits audio oscillation circuits Updated: 2021/03/12
Shown is the cable anti-theft alarm circuit . This circuit is composed of a cable detection circuit and an audio oscillation circuit . When the cable is stolen, the short circuit is destroyed, the photosensitive transistor in the photocoupler is cut off, and the audio oscillation circuit
composed of NE555 is started. , oscillates and sounds to
alarm.
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