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Eight-way wireless burglar alarm system circuit diagram

2016-11-20 05:37  
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Eight-way wireless burglar alarm system circuit diagram
(a) shows the alarm monitoring and emission extension, KD9562 forms the alarm monitoring station launchesby 8 trigger terminals. The security monitoring circuit is composed of pyroelectric infrared detector module HL911L. When the situation occurs. HL911L's pin ① outputs high level. Then you can turnon the electronic switch to connect the internal circuit of TWH8778. TWH8778's pin ③ outputs high level, then the relay K is pulled in. Contaction switch KSwill makeemission component FDD5 work. (B) shows the host alarm receivingcircuit. When JDD5 gets the alarm signal sent by alarm extension. It will be demodulated. When JDD5 receives the alarm signal sent by the police station. The signal output by the output terminal is audio signal. It will make alarm sound through speaker.