High Power Siren circuit
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
Sound Generators
Morse code generator circuit – simple code learning
This morse code generator circuit is suitable for learning basis of communication. Unbelievably, short and long tone can be decoded into letters and text. Read more
2 Simple Buzzer Circuit
This buzzer circuit is simple, small, cheap, and requires 3V to 12V. It only uses transistors, piezo or small speaker, and a few components. Read more
5 Simple Electronic Siren Circuit Using Transistors
Here are simple electronic siren circuits using transistors suitable for a beginner learning electronics. It only requires 6V to 12V power. Read more
Rat and Cockroach Repellent Circuit Using Astable Multivibrator
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