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Simple Buzzer Circuit using 8 Ohm Speaker

Last Updated on November 16, 2024 by Admin Leave a Comment

The discussed circuit produces sounds which resembles to an authentic buzzer. It operates using just two integrated circuits and a minimal number of components.

high power buzzer circuit diagram using loudspeaker.
Just a quick note: Remember, to link pin number 4 of the IC 555 to the positive power supply.

When you press the switch S1, the capacitor C1 starts to get power through the resistors R1 and R2. This action sets off pin 2 of the 555 timer, IC1.

Then IC1 makes pin 7 go low, which makes the capacitor lose its charge through R2. This process keeps going as long as you keep S1 pressed.

The signal from IC1 (at pin 3) changes back and forth with the capacitors charge and discharge cycles, creating a sound wave for IC2. IC2 is an LM386 audio amplifier which makes the sound louder.

You use a speaker to copy the sound from IC1 that sounds just like a real buzzer. If you want the buzz to be lower pitched, try using a bigger capacitor for C1 like 0.1 uF.

To make the setup more stable, you can connect a 47 uF capacitor from pin 7 of IC2 to the ground.

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About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

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