Basic Electronics

A resistor whose resistance value can be adjusted as per requirement is called as Variable Resistor. The two most common used variable resistors are Rheostat and Potentiometer.

Let’s discuss How Pull-up and Pull-down resistor works in Electronic Circuit. These resistors used when a constant voltage is required at input pin of a digital device (for example, Microcontroller).

Learn how to calculate resistor value using color code. When comes to measure the value of resistor we can do that by several ways. But we'll explore color code method for through hole resistor.

This post is about What is Resistor? and Why we need Resistor in Circuit. Resistor has a property of resistance. This property limits (controls) the flow of current to a safe value, so that other part in circuit can work properly.