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Kits

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

There are different types of circuits that produce different kinds of sounds. Here is a simple circuit that produces wailing siren. The main principle of this

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

Metal detector is a very common device that is used for checking persons, luggage or bags in shopping malls, hotels, cinema halls, etc. to ensure

Human detection robot is not a new technology. Many types of human detection robots were designed depending on the application. During the natural calamities like

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

Almost every household needs a decent TV stand now that there are a lot of great options available in the market for a TV that

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

FM Radio circuit is the simple circuit that can be tuned to the required frequency locally. This article describes the circuit of FM radio circuit.

Audio tone control circuits are mainly used for 2 reasons. The first reason is to control the BANDWIDTH of the signal, which is entering into