electronic siren circuit diagram

Electronic Siren with Multitone

This multitone electronic siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more earcatching than a single-tone siren.
The circuit is built around popular CMOS oscillator-cum-divider IC 4060 and small audio amplifier LM386. IC 4060 is used as the multitone generator. A 100μH inductor is used at the input of IC 4060. So it oscillates within the range of about 5MHz RF.

IC 4060 itself divides RF signals into AF and ultrasonic ranges. Audio signals of different frequencies are available at pins 1, 2, 3, 13 and 15 of IC 4060 (IC1).

These multifrequency signals are mixed and fed to the audio amplifier built around IC LM386. The output of IC2 is fed to the speaker through capacitor C9. If you want louder sound, use power amplifier TBA810 or TDA1010. Only five outputs of IC1 are used here as the other five outputs (pins 4 through 7 and 14) produce ultrasonic signals, which are not audible.

Assemble the circuit on a general-purpose PCB and enclose in a suitable cabinet. Regulated 6V-12V (or a battery) can be used to power the circuit.

Electronic Siren Circuit Diagram

electronic siren circuit diagram


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  • Nitin Sitaram Mandavkar

    i am intrested electronics project makes

  • Alexander

    Thank you for many information which I here dig out.
    I was tow times with pleasure and check over and over.
    All information for me useful so Mach.
    I’m already fabricate any good device for home.
    Mercy with respect Alexander.

  • Deanna Gill

    We are in need of multiple tones on our siren for emergency situations. Will your product work? If so what is the price?

  • johnny

    Hey Guys
    What brings me to your forum is a problem I’m half Mohegan Indian here in Ct . We are having problems with 2 stray dogs constantly on our propery and a stray wolf and bad neighbor with dog that are always on our property my daughter is in danger. I do not wish to put up a fence also no effective police nor health dept.. I wish to aquire or have build a powerful outdoor ultrisonic system , Ive built and fabricated mickey mouse internet sonic systems with no effect. IF this is something someone could build for us. I’am willing to pay upfront for parts and labor and after testing success another dozen units. I can also offer a free stay@ Mohegan sun resort and any free concerts for anyone who is knowledgable to build such a unit.. My family thanks you for anyhelp that you might provide..


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