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Sound Generator

High power siren circuit using CD40106 and TIP31, small and easy

Last Updated on: June 14, 2022 by Apichet Garaipoom
High power siren circuit using CD40106

This is High power siren circuit with small PCB size, using CD40106 and four transistor TIP31-TIP32 increase current to horn speaker 20W, 4-8ohm. , and

Categories Sound Generator Tags CD40106, Sirens, TIP31 4 Comments

Morse code generator circuit – simple code learning

Last Updated on: June 20, 2022 by Apichet Garaipoom
Morse code generator circuit

This morse code generator circuit is suitable for learning basis of communication. Unbelievably, short and long tone can be decoded into letters and text.

Categories Sound Generator Tags Tone Generator, Intercom systems

Making Simple Buzzer circuit

Last Updated on: June 20, 2022 by Apichet Garaipoom
Make Simple Electronic Buzzer circuit

This is buzzer circuit easy to build with small size,cheaper using normal transistor and small piezo speaker can use for 3V to 12V as use parts resistors[…]

Categories Sound Generator Tags Tone Generator, Electronic buzzer, multivibrator transistor circuit 13 Comments

Mosquito repellent circuit project

Last Updated on: July 12, 2021 by ElecCircuit.com
Beware the mosquito bite

The mosquito repellent circuit to generates small sound frequency using transistors as bistable multivibrator. It is economical, safer than using chemicals.

Categories Sound Generator Tags Tone Generator, Astable multivibrator, Ultrasonic Electronic Repellers 22 Comments

6 Simple transistor | police | ambulance Siren (audio alarm) circuits

Last Updated on: April 17, 2022 by Apichet Garaipoom
Simple transistor Police Ambulance Siren circuit

Today I would like to introduce the simple and economical simple siren circuits. It is suitable for beginners. My son will gradually build this circuit onto the PCB layout. Look at below! 4 Circuits.

Categories Sound Generator Tags Astable multivibrator, 2N2222, 2N3906, Sirens 22 Comments
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