Visual doorbell circuit 1

Published:2011/8/17 21:19:00 Author:Jessie | Keyword: Visual doorbell | From:SeekIC

Thefigureshows the outdoor circuit, andAN1, AN2are the bell buttons, when a guest visits to press a button switch, the power all the wayprovides powerforcoding launch circuit through the AN2, and it transmits 315MHz coding signal, and the 1N4148charges to 10 uF timing capacitor. Theother way can providepower suppliesfor delay circuitby AN1, then relaygets power and is connected, thenits contact J-1 isclosedfor self-protection. Meanwhile LM386composes voice test circuit, cameras and 2.4 GHztransmitting modulewill get powertowork, thentrasmitting module emits a high frequency signal that modulated by AV.



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