sound activated lamp relay switch


Posted on Feb 6, 2014

This simple circuit shown int the schematic diagram actives the switch using sound. We can use this circuit for various applications, such as automatic (sound-controlled) disco light or car`s LED light show. The Q1 amplify the audio from mic. The R1 is used to adjust the peak of signal to greater than about 0. 7 volts, act as sensitivity adjuster.


sound activated lamp relay switch
Click here to download the full size of the above Circuit.

A certain level, the signal coming from microphone, after amplification by Q1, will trigger the SCR and light lamp I1. If we change the lamp with a relay, then we can get a sound-activated relay/switch, which can be used to control more powerful / high wattage high voltage lamps.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    220 V LED Night light
    CELLPHONE SERVICE-PHANI BUGUDUR
    CSC231 Homework
    op amp Amplifying signal from CO2 Sensor
    Project Tutorial
    electronics and communication projects
    24V flasher circuit
    Positive voltage to negative voltage converter
    Voice changer circuit diagram electronic projects using RTS0072B
    Multiple switches on Arduino analog pin schematic
    PICAXE 08M control of audio/video cabinet cooling
    Dummy Transmission Circuits for Subcutaneous Transmitter
    DIY/Homemade Radiation Geiger Dosimeter
    ACCURATE MOTOR SPEED CONTROL
    Precision Power Supply 0-40V 0-2A adjustable current limiting
    PROM CW IDENTIFIER



    Top