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Vibration anti-theft alarm circuit
Source: InternetPublisher:太白金星 Keywords: Anti-theft alarm circuit voice alarm piezoelectric ceramics Updated: 2021/09/08
It uses HL-169B type voice alarm integrated circuit A. It can be used for
anti-theft alarms in safes, glass doors and windows, car doors and windows, etc. When a thief hits such an item with violence, the piezoelectric ceramic piece A vibrates , the
thyristor V is turned on, and the alarm issues a voice alarm of " Catch the thief!" The alarm is released only when the release button SB is pressed.
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