555 Timer

The Touch ON and OFF Switch Circuit is built around a 555 timer by making use of the default properties of the Pins of the

Many electrical and electronic appliances require DC or AC power for their operation. While AC power is made available mostly through AC supply mains, DC

This circuit protects the costly equipment like TVs, air conditioners, Refrigerators, etc. from high voltages as well as low voltages. If the supplied voltage is

This circuit is designed to alert the user when an intruder enters into the home. If there is any obstacle in front of IR sensor,

Have you ever tried to design a circuit that produces sound? Here is the circuit that produces five tones. This is a simple toy piano

Nowadays, door bells are very common in every house. We daily observe different types of door bells are available in the market and they produce

This article describes the principle, design and operation of a digital stopwatch circuit. A digital stopwatch can be a circuit displaying the actual time in

This article is written to describe the design and working of a simple LED cube circuit. Most of the LED cube circuits are designed using

Have you ever thought of transmitting audio and video signals? Here is the simple circuit that amplifies and transmits audio, video signals. These are transmitted

An LC meter circuit is used to measure value of a reactive element like a capacitor or an inductor. This article describes the design and