Sound Controlled Time Delay Energy Saving Switch Circuit Composed of CD4069

Published:2011/7/27 5:38:00 Author:Sue | Keyword: Sound Controlled, Time Delay, Energy Saving | From:SeekIC

This sound controlled switch has high trigger sensitivity, and it can be triggered by people's footstep and it will close automatically after time delay of 20s. It works well, convenient and energy saving. The circuitconsists ofone hex inverter CD4069, piezoelectric acoustic sensor and one bidirectional thyristor with simple structure. It is economic and convenient with great promotion value. The picture shows the circuit which consists of acoustic sensor, voltage amplifier, light control circuit, delay circuit, thyristor and its trigger circuit.



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