Metal Oxide Varistor (MOV) are voltage  dependent symmetrical resistors intended to protect equipment from transient voltages resulting from lightning strikes. This component is located near the ac supply input and before the bridge rectifier.   ... Read more »

There are many types of transistors in the market, most of the time by reading the first number or alphabet printed on the transistor we can know as which type the transistor belong to.  ... Read more »

Transistor is an active device and it is use to perform rectification, switching and rectification. The name "transistor” is derived from "trans resistor” which means it changes resistance.  ... Read more »