Siren Amplifier Circuit Diagram. It is built on a single chip cd4011 ic1. The complete circuit diagram for this 3 in 1 siren circuit is furnished below.

The complete circuit diagram for this 3 in 1 siren circuit is furnished below. This electronic police siren circuit diagram using 555 timer will produce an up down wailing sound from the speaker. The dual op amp is used as a signal generator that produces square pulse and triangular or saw tooth wave forms.

Its easy to extend the circuit to a 12v 5 w car siren.

Circuit description of electronic siren circuit. Output of first ic is shifted to second ic control voltage pin which produce up down frequency sound. Circuit description of electronic siren circuit using op amp 741. Opamp non inverting amplifier to amplify signal and drive buzzer.