Alarm circuit with self-locking
Source: InternetPublisher:念慈菴 Keywords: Alarm circuit power switch Updated: 2020/02/15
Normally, the button (or switch) SB is in a closed state. Once SB is disconnected, the
alarm will be alarmed and locked. Even if SB is closed again, the alarm cannot be stopped. To release the alarm state, you can only turn off the power switch
SA. The self-locking circuit can be restored.
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