American Police Car Siren by IC 555


Posted on Feb 5, 2014

The second circuit simulates the siren of an American police car. It uses two 555 timers in the circuit. The 555 on the right is wired as an alarm tone generator and the second 555 timer on the left is wired as a low frequency astable timer which generates a ramp waveform of about 6 seconds that is buffered by the transistor and again used to freq


 American Police Car Siren by IC 555
Click here to download the full size of the above Circuit.

uency modulate the tone generator. The transistor is used to help strengthen the signal to the speaker




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Octave Equalizer Circuit
    Bass-treble Tone Control Circuit With LM1035N IC
    Honda Motorcycle CB750F Wiring Diagram
    sound Circuits
    wein bridge oscillator using jfet
    Dome Drive Schematic
    Christmas LED Light String Display
    CW117 CW217 CW317 schematic configuration of the constant voltage constant current source
    One of the battery discharge protection circuit



    Top