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:: Home » Oscillator circuits » Page 3

Oscillator circuits

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

Last Updated on: July 15, 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 Read more

Categories Oscillator circuits Tags CD40106, Sirens, TIP31 5 Comments

Making Simple Buzzer circuit

Last Updated on: July 15, 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[…] Read more

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

Mosquito repellent circuit project

Last Updated on: July 15, 2022 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. Read more

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

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

Last Updated on: July 15, 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. Read more

Categories Oscillator circuits Tags 2N2222, 2N3906, Sirens, Astable multivibrator 22 Comments

Mouse and Rat repellent circuit using astable multivibrator

Last Updated on: July 15, 2022 by Apichet Garaipoom
Rat and cockroach repeller circuit diagram

The Mouse and Rat repellent circuit using astable multivibrator which use sound waves or ultrasonic so it escaped away. Use transistor and piezoelectric. Read more

Categories Oscillator circuits Tags Astable multivibrator, Ultrasonic Electronic Repellers 10 Comments
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Categories

  • Amplifiers (94)
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  • Power supply (86)
    • Variable Supply (20)
    • Switching Mode (15)
  • Inverters (14)
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  • Digitals & Microcontrollers (35)
  • Controls & Timers (55)
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