Posts by Sidra Aziz

An intercom is a stand-alone voice communications system for use within a building or small collection of buildings. It is a two-way communi…

Nowadays in the music industry, electric guitars play a giant role. A guitar amplifier is an electronic circuit that is usually housed in a…

Sound-activated switches are designed to provide a mechanism through which one can turn on or off any electrical appliance remotely through…

Relay is a component that provides complete electrical isolation between their input and output contacts at very high, almost infinite resis…

Nowadays, most children's toys like cars and bicycles are equipped with sirens. This siren can easily be made with few electronic components…

A latch circuit is a circuit that locks its output when an input trigger signal is applied and retains that state, even after the input sign…

Ring tones in the old telephone sets and piezo buzzer in the current electronic telephone instruments are not so melodious. In order to make…

The motor plays an important role in many engineering applications. People always search for an efficient and easy way to control these moto…

A volume unit (VU) meter is a device displaying a representation of the signal level in audio equipment. They are used in telephone installa…

Siren is a continuous tone that varies in frequency. Usually, the output of the siren circuit is very low which is hard to hear. Therefore…

Have you ever forgotten to shut your home door at night? This might be a terrible experience as it can provide a way to thieves to enter you…

With the rising number of mosquito-borne illnesses like malaria or dengue, control of mosquitoes is something of utmost importance in the pr…

A simple electronic toy piano can be easily constructed using transistors and a few discrete components. The circuit consists of two parts…