When we plug in Precision Electronic Rat Repellent Circuit device, it makes high loud noise that rat and mouse do not like. Human and animal cannot hear this noise because its too high sound. Good choice if we do not want to use poison. It just makes strong sound wave and rat gets scared and […]
Oscillator Circuits
Simple Phase Shift Oscillator Circuit using a Single Transistor
Simple Phase Shift Oscillator Circuit using a Single Transistor is like a special electric circuits. They make electric go up and down like water wave. These waves can be soft or hard and also look like curved. How fast wave go up and down are controlled by the circuit control There are many types of […]
Simple Electronic Fishing Lure Circuit
This article for Simple Electronic Fishing Lure Circuit shows how to make electric fishing lure. It uses small buzzer to make sound when fish come. Easy to make and also works very good. Be careful: fishing rules not same everywhere. Before using electric lure check in your country if it is allowed or not. What […]
Simple Beat Frequency Oscillator (BFO) Circuit
Simple BFO circuit is small electronic circuit which make signal sound when mix with other signal. This circuit help to hear weak radio signal like in old radio or metal detector. It is easy to build and uses one transistor part called a bipolar junction transistor (BJT). What is Beat Frequency Oscillator: BFO are used […]