Latest British Police Car Siren circuit


Posted on Feb 7, 2014

The 555 on the right is wired as an alarm sound generator and the second 555 timer on the left is a 1 Hz astable multivibrator. The output of the left timer is to modulate the frequency of the right timer. This process will cause the right timers frequency to alternate between 440Hz and 550Hz at a 1 Hz cyclic rate. The transistor 2N3055 is used to


Latest British Police Car Siren circuit
Click here to download the full size of the above Circuit.

amplify the sound signal to the loudspeaker. This circuit should be nice for newbie hobbysts.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    500w-power-amplifier-with-2sc2922.html
    DIY siren project
    Proximity detector electronic project circuit design
    LED Volt Meter
    Circuit example of the LM381
    Zero-power regulator circuit diagram
    Mains undervoltage overvoltage protection circuit of five



    Top