What is a resistor

A resistor is nothing magic. Take a long wire and measure the resistance, and you will realize that resistance is just a normal property of wires (except for superconductors). Some resistors are made up of just that. A long wire. But you can also find resistors made of other types of materials. Like this carbon … Continue reading What is a resistor


Diode Testing

The steps required for testing of a diode rectifier are as follows. Take a good quality digital multimeter Set the range in the diode position On the display you should get a 3 or an infinite voltage reading depending upon the multimeter used Connect the red probe to the cathode and the black probe to … Continue reading Diode Testing

Understanding Rectifier Diodes

This article explains the characteristics and use of diode rectifier circuits, as well as detailed information regarding the process of rectification. The article also deals with testing procedures in simple steps that can be very handy for new electronic enthusiasts.Introduction: A diode rectifier is a semiconductor device and comes under 'active' electronic components. Its basic … Continue reading Understanding Rectifier Diodes

What’s the Difference Between AC and DC Electric Shocks?

What are the physical differences between shocks by AC and DC current? Both are dangerous and can be lethal in high amounts. Learn more here. Difference between AC and DC CurrentAn AC current is alternating in nature and follows a sine curve. It is continuously changing direction and passing through zero to a maximum positive … Continue reading What’s the Difference Between AC and DC Electric Shocks?

Light-emitting diodes (LEDs)

LEDs (light-emitting diodes), the modern craze in lighting, hold the promise of making obsolete Edison’s greatest invention, the incandescent light bulb. They are in toys, in automobiles, in stop signs, in every color- shifting gadget, and are even being added to clothing. These techno-sequins are arguably the greatest crafting material invented. Why are LEDs so … Continue reading Light-emitting diodes (LEDs)

Functions of Resistor Contd. (LED Current Limit)

Just like in transistor biasing as discussed yesterday LEDs(Light Emitting Diodes) too are very sensitive to high currents. A resistor when placed in series with the LEDs regulates a proper flow of current through them. To calculate the value of a series LED resistor, the following formula may be used: R = V –( N.V … Continue reading Functions of Resistor Contd. (LED Current Limit)

Functions of resistors CONTD. (TRANSISTOR BIASING)

TRANSISTOR BIASING One of the functions of a resistor is in biasing the base of a transistor. A transistor basically needs a small base voltage (>0.6) to make a large voltage flow through its collector/emitter terminals. But the base of a transistor is quite vulnerable to high currents, so a resistor is incorporated here to … Continue reading Functions of resistors CONTD. (TRANSISTOR BIASING)

Functions of Resistors in Electronic Circuits Explained

In an electronic circuit, the basic function of a resistor is to limit the current to a safe value so that the associated sophisticated parts can function properly. Read the article to understand what is the function of a resistor, through illustrated examples and formulas. Introduction Resistors come under passive electronic components and are extensively … Continue reading Functions of Resistors in Electronic Circuits Explained