Site icon Circuit Ideas for You

Simple Multi-Tone Electronic Siren Circuit

Make it more fun with one siren circuit that makes many sounds.

This small thing work like alarm sound toy which is good as warning.

Not just one boring sound it makes many loud noise one after one or same time!

It works well to get people to look and listen quickly.

No more “beep beep” only now one can get big noisy siren for real attention!

Circuit Working:

Parts List:

CategoryDescriptionQuantity
Resistors 10k 1/4 watt6
10Ω 1/4 watt1
CapacitorsCeramic 0.22μF5
Ceramic 0.1μF2
Ceramic 0.04μF1
Electrolytic 10μF 25V1
Electrolytic 220μF 25V2
SemiconductorsIC 40601
IC 3861
Coil 100μH1
Speaker 8Ω 1W1
ON/OFF Switch1

In this circuit siren is smart one which can be used in many ways like for thief alarm or back horn in vehicle etc.

It makes 5 different sounds not just one so people hear it better.

Main parts are IC 4060 which makes sound and LM386 which make sound louder.

Together they work like magic sound maker.

We have put 100μH coil before IC 4060 which helps make fast wave around 5MHz, that is radio wave speed.

IC 4060 break this wave into slower sound from which some one can hear and some too high for ones ear.

Sounds come out from pin 1, 2, 3, 13 and 15.

All those sound signals go inside LM386 chip which make them loud.

Then this loud sound go to speaker through one part called C9 capacitor.

If anyone wants more loud sound ? You can use big power amp like TBA810 or TDA1010 which will make it shout!

Only five outputs of IC 4060 used here and others like pin 4 to 7 and 14 make sound too high which human wont be able to hear.

Build it on small PCB board by putting it in strong box.

One should give it power from battery or from 6V to 12V adaptor but clean power is always the best.

Formulas:

We can make Multi-Tone Siren using parts from the circuit diagram shown above.

Main job done by oscillator is it makes many sound frequencies.

After that it makes sound louder and send to speaker.

How to Find Frequency:

CD 4060 chip makes sound at frequency f:

f = 1​ / 2.3 × R × C

where:

We can change R or C to get different sound.

Bigger or smaller values make low or high sound.

Try different R and C and then one can get siren effect with many tones changing one by one.

Just by using different resistors and capacitors this circuit can make fun siren with many sound styles.

How to Build:

To build a Simple Multi-Tone Electronic Siren Circuit follow these easy steps for connections:

Gather All Parts:

Ready the PCB:

Add IC 4060 and LM386:

Connect Coil and C9:

Optional Add Power Amp:

Connect Speaker:

Put in Box:

Give Power:

Test the Siren:

Finish Up:

Note:

Conclusion:

To conclude this Simple Multi-Tone Electronic Siren is useful little circuit.

It can make many types of sound which are good for different jobs.

It use parts like oscillator, divider, amplifier and speaker driver to make loud and clear tones.

Because it can change sound it is great for alarm alert, signal or even fun sound setups.

This small circuit can do big job and grab attention fast and send strong warning when needed.

References:

Siren (alarm)

Datasheet IC 4060

Datasheet IC LM386

Exit mobile version