Tag Archives: electronic siren

Electronic Siren Circuit Diagram using 741 Op Amp IC

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The schematic below appears Electronic Siren Circuit Diagram using 741 versatile IC. The siren can be used as the home alarm output or automobile security system. This Electronic Siren Circuit Diagram is built by semiconductors and components such as 741 Operational Amplifier (IC1,IC2), AC187 – T1, AC188 – T2, Resistors… Read more »

Electronic Siren based NE555

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Here the circuit diagram of electronic siren based NE555. This circuit produces a sound like factory siren. It applies a 555 timer IC which is utilized as an astable multivibrator of a center frequency of about 300Hz. The frequency is controlled by the pin 5 of the IC. When the… Read more »

Electronic Siren

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This is Electronic Siren circuit diagram. The sound produced imitates the rise and fall of an American police siren. When first switched on the 10u capacitors is discharged and both transistors are off. When the push button switch is pressed to 10u capacitor will charge via the 22k resistor. This… Read more »

British Police Car Siren

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This is the sound generator which will simulate British police car siren. The circuit is built using 2 pieces of timer IC 555 to generate sound frequency. How the circuit work: The 555 on the right is wired as an alarm sound generator and the second 555 timer on the… Read more »