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Intelligent lock control balcony alarm bell circuit diagram

2017-01-07 08:56  
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Intelligent lock control balcony alarm bell circuit diagram
Figure 1 is a transmitter circuit which is installed at the gate. AN is the doorbell button, and K is the lock control switch; when all the family goes out and locks the check-lock for insurance, the K connected automatically to play the role of fortification. When people press the AN or connect K, RCM-1A will launch 250 ~ 300MHz radio wave by modulation, Figure 2 is a receiver circuit, which is installed in the balcony ceiling, and RCM-1B can receive the modulation radio waves and pin 2 output is in high level, thereby it triggers the language IC to work.