Mosquito repellent circuit project
The mosquito repellent circuit to generates small sound frequency using transistors as bistable multivibrator. It is economical, safer than using chemicals. Read more
Oscillator circuits
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
Cricket Sound Generator Circuit
This cricket sound generator circuit uses the LM324 OP-AMP as a frequency generator and a buzzer to emit sound without using ROMs. Read more
Sine wave oscillator low frequency-constant amplitude
SEE! Simple Sine wave oscillator low frequency. Without thermistor and Incandescent lamp so very linear in transistor and zener diode circuit. Read more