LDR is a special kind of resistance, which varies according to the light falling on it.

An LDR is a kind of light sensor and is also called photoresistor. It is made up of photo resistive material Cadmium Sulphide.
LDR’s resistance varies [..]

The transistor was invented by John Bardeen, Walter Brattain and William Shockley in 1947.

The advent of transistor revolutionized the electronics world. Slowly and steadily, transistors became the basic building blocks of modern electronic circuits..[]

We are surrounded by different kinds of sounds all the time. For example: the sounds produced by musical instruments, humming of birds, or a wailing child.
Speaker is a vital electronic component which produces sound. It is an electromechanical device which ..[]

LED which looks like a small bulb is a special kind of electronic component called diode. Full form of LED is light emitting diode.
Diode is a semi conductor device which allows the current to pass through it in one direction only.
If the diode is connected properly..[]

Capacitors are used extensively in electronic gadgets like TV, Radio, Camera etc. Tuning of a particular station in radio is done through variable Capacitors. They are available in various types. Capacitor can be classified as Polarized and non polarized capacitor…[..]

Capacitor is one of the passive components used in electronic circuits. It acts as a temporary battery. Its main function is to store electricity and release it whenever required. They are also called condensers[….]

We learnt some facts about Resistors in the previous blog. Now let us learn about the trick to read their value.

Some resistors are large enough to have their value printed on them. However, most of them are too small in size to have their value printed on them. Therefore, a system of colour-coding is adopted to indicate their value.[..]

Resistor is one of the passive components used in electronic circuits.

It is used to limit the flow of current in a circuit. It’s main aim is to resists the flow of electricity.
Resistance can be compared to friction. As we know,[..]

We are amazed by huge buildings with fantastic architectural designs, aren’t we? These buildings are made of brick and mortar. Similarly, an electronic circuit may appear complicated and may be capable of doing amazing thing [..]

In the last blog, we learnt about current and voltage. Now, let us learn and discuss different types of current. We know that the flow of electrons constitutes current and voltage is the electric force that causes flow of electrons. For flow of current, electrons must be moving regularly.

We have read about current in the previous blog. As we know, flow of electrons in one direction is called electric current. The driving force behind the current is voltage. Let’s consider different examples from day to day life to understand the concept of voltage....

In the previous blog we learnt about a simple circuit. We connected 2 cells with a bulb/LED and the bulb glowed.