Simple Multi-Tone Electronic Siren Circuit

Spice things up with a multi tone electronic siren circuit.

This gadget is like a sound effects machine for alarms and warnings.

Instead of one flat tone, it can blare out a variety of sounds one after another or even all at once.

This makes it perfect for grabbing attention and getting your message across clearly.

So, ditch the predictable “beep beep” and get a siren that creates a real ruckus!

Circuit Working:

Parts List:

This versatile electronic siren offers a range of applications including burglar alarms and reverse horns boasting five distinct audio tones for enhanced attention grabbing compared to single tone sirens.

Constructed around the widely used CMOS oscillator cum divider IC 4060 and compact audio amplifier LM386, the circuit functions as a multitone generator.

Incorporating a 100μH inductor at the input of IC 4060 ensures oscillation within the approximately 5MHz RF range.

IC 4060 divides RF signals into audible and ultrasonic frequencies delivering various audio signals at pins 1, 2, 3, 13 and 15.

These multifrequency signals are mixed and channeled into the audio amplifier based on IC LM386.

The resulting output from IC2 is then transmitted to a speaker via capacitor C9.

For increased volume consider integrating a power amplifier such as TBA810 or TDA1010.

Notably, only five outputs of IC1 are utilized here as the remaining five pins 4 through 7 and 14 produce ultrasonic signals beyond human hearing range.

Assembly of the circuit onto a general purpose PCB enclosed in a suitable cabinet is recommended.

Powering options include a regulated 6V to 12V supply or a battery.

Formulas:

We may use the following method to create a Multi-Tone Electronic Siren circuit with the components in the above circuit diagram.

Usually, oscillators are used in this kind of circuit to produce different frequencies, which are subsequently amplified and utilized to power speakers.

Calculating Frequency:

The CD4060s oscillation frequency, f is determined by:

f = 1​ / 2.3 × R × C

where,

• R is the resistance.
• The capacitance is denoted by C.

You can change R and C values to generate different tones.

Using multiple combinations allows you to create a siren like effect with varying tones.

These parts may be used to make a multi-tone siren circuit with different sound effects by varying the values of the resistors and capacitors.

How to Build:

To build Simple Multi Tone Electronic Siren Circuit follow the below mentioned steps:

Prepare the Components:

• Gather all the components shown in the diagram

Prepare the PCB:

• Arrange the components on a general purpose PCB according to the schematic diagram of the circuit.

Connect IC 4060 and LM386:

• Connect the CMOS oscillator cum divider IC 4060 and the small audio amplifier LM386 to the PCB following the pin configurations provided in the datasheets of the components.

Connect the Inductor and Capacitor C9:

• Wire the 100μH inductor at the input of IC 4060.
• Connect capacitor C9 to the output of IC2 which feeds into the speaker.

Optional Power Amplifier Integration:

• If you choose to use a power amplifier for louder sound, connect it to the output of IC2 according to its datasheet.

Connect the Speaker:

• Wire the speaker to the output of the circuit, either directly or through the power amplifier if you are using one.

Enclosure:

• Place the assembled circuit into a suitable enclosure to protect it and to provide a professional finish.

Power Supply Connection:

• Connect the regulated 6V to 12V power supply or battery to power the circuit.
• Ensure the polarity is correct to prevent damage.

Testing:

• Before sealing the enclosure, test the siren to ensure it functions correctly and produces the desired tones.

Finalization:

• Once testing is successful seal the enclosure and secure all connections to prevent any short circuits or damage during use.

Note:

• Following these steps should enable you to build the multitone electronic siren successfully.
• If you need further assistance referring to the datasheets of the components and consulting with an electronics expert may be helpful.

Conclusion:

In conclusion, a multi tone electronic siren circuit is a versatile electronic device capable of generating a range of audible tones for diverse applications.

By employing oscillators, frequency dividers, amplifiers and output drivers, this circuit offers flexibility in producing various tones suitable for alarms, notifications and signaling needs.

Its adaptability makes it an essential component in security systems, emergency alerts, industrial signaling and entertainment setups, providing an effective solution for generating distinctive and attention grabbing auditory signals.

References:

Siren (alarm)

Datasheet IC 4060

Datasheet IC LM386