DIY Sound Activated LightsCircuit


Posted on Feb 5, 2014

This diy sound activated lights circuit turns a lamp ON for a brief length when the canine barks (or a somewhat strong sound) providing an impression that the occupants happen to be alerted. The condenser microphone fitted in a place to watch sound and generates AC signals, which pass by means of DC blocking capacitor C1 for the base of transistor


DIY Sound Activated LightsCircuit
Click here to download the full size of the above Circuit.

BC549 (T1). Transistor T1 along with transistor T2 amplifies the sound signals and offers existing pulses in the collector of T2. When audio is produced in front from the condenser mic, triac1 (BT136) fires, activates lights plus the bulb (B1) glows for about two minutes. Assemble the sound activated lights circuit on a general objective PCB (circuit board) and enclose inside a plastic cabinet. Energy for the sound activated change circuit is often derived from a 12V, 500mA step-down transformer with rectifier and smoothing capacitor. Solder the triac making sure adequate spacing among the pins to avoid short circuit. Resolve the unit within the dog`s cage or shut to the audio monitoring spot, using the lamp within or outdoors as sought after. Connect the microphone for the sount activated lights circuit employing a brief size of shielded wire. Enclose the microphone inside a tube to increase its sensitivity.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Nite Rider LEDS
    Room thermometer with LEDs
    Warning light
    Motor-tachometer speed control
    Tv Line Pulse Extractor
    Large Lcd Display Buffering Driver Circuit
    Arduino Make your own hardware
    Head light timer circuit
    High Impedance DC Voltmeter Circuit Using Op Amp
    transistor tester circuit
    Schematic circuit diagram of low voltage and low voltage automatic conversion
    Discharge After the memory circuit



    Top