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Laptop Charger Circuit from 12V Battery

Last Updated on June 7, 2022 by Swagatam 126 Comments

The post discusses a simple car laptop charger circuit for charging laptops from a 12V car battery using a IC 555 based boost converter. The idea was requested by one […]

Filed Under: 555 IC Circuits, Battery Chargers, Power Electronics

Adjustable 0-100V 50 Amp SMPS Circuit

Last Updated on July 3, 2019 by Swagatam 99 Comments

The high power adjustable switching power supply is perfect for the purpose of laboratory work. The topology used to design the system is switching topology – half controlled bridge. Written […]



Filed Under: Power Electronics, SMPS

SMPS Halogen Lamp Transformer Circuit

Last Updated on November 20, 2021 by Swagatam 19 Comments

One of the best substitutes for traditional light transformer for halogen bulbs is the electronic halogen transformer. It can also be used with non-halogen bulbs and any other form of […]

Filed Under: Industrial Electronics, Power Electronics, SMPS

SMPS 2 x 50V 350W Circuit for Audio Power Amplifiers

Last Updated on May 5, 2022 by Swagatam 313 Comments

This article will illustrate a simple procedure to devise an unregulated 50V switching SMPS symmetric power supply of 350W. This unit can be substituted with the standard audio amplifier power […]

Filed Under: Audio and Amplifier Projects, Power Electronics, SMPS

Compatible LED Tube Light Circuit for Standard Ballast Fixtures

Last Updated on March 13, 2019 by Swagatam 9 Comments

In this article we will study a simple LED tube light circuit which could be directly replaced with faulty 40 watt T17 fluorescent tubes and fitted directly on the existing […]

Filed Under: LED and Light Effect, Power Electronics

Mains 20 Watt Electronic Ballast Circuit

Last Updated on May 2, 2020 by Swagatam 18 Comments

The post explains a simple 20 watt fluorescent ballast circuit using a single chip FAN7711 from Fairchild semiconductor. The proposed mains 220V operated, 20 watt fluorescent ballast circuit is built […]

Filed Under: Home Electrical Circuits, Power Electronics



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