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Archives for 2013

Sequential Bar Graph Turn Light Indicator Circuit for Car

Last Updated on April 28, 2026 by Swagatam 167 Comments

SequentialLEDPart2

The article illustrates a simple yet innovative, fancy car turn signal light circuit which produces a rising bar graph sequence effect when switched ON. The circuit idea was requested by Mr. +Bruce Lowry. I have explained more. Technical Specifications I am after a circuit design similar to the LED Bar Graph circuit that is found […]

Filed Under: Automobile Electronics, Lamps and Lights Tagged With: Graph, Indicator, Light, Sequential, Turn

12V DC to 220V DC Boost Converter Circuit

Last Updated on March 17, 2026 by Swagatam 126 Comments

In this article I have explained a very simple method of acquiring 220V DC from a 12V DC source. The idea utilizes inductor/oscillator based boost topology with the help of the IC 555. Circuit Operation Now let us learn more about this simple 12V to 220V DC boost converter circuit, which is built around IC […]

Filed Under: Power Supply Circuits Tagged With: 12V, 220V, Boost, Converter, DC

Understanding SG3525 IC Pinouts

Last Updated on February 16, 2026 by Swagatam 332 Comments

sg3525 ic pin out explained

In this article I have explained the pinout functions of the IC SG3525 which is a regulating pulse width modulator IC. So I have explained in details: Main Technical Features The main features of the IC SG3525 may be understood with the following points: Pinout Diagram of the IC SG3525 PinOut Description A practical implementation […]

Filed Under: Electronics Theory Tagged With: Pinouts, SG3525, Understanding

IC 555 Low Battery Indicator Circuit

Last Updated on February 2, 2026 by Swagatam 59 Comments

lowbatteryindicatorcircuitusingIC555

In this article I have explained a simple low battery indicator circuit using the IC 555 and a few resistors only. Circuit Concept Many electronic circuits such as emergency lights,  battery chargers, UPS systems, flashlights etc essentially require a low battery indication feature in order to avoid over discharge of the involved battery. An over discharge could mean a permanent damage […]

Filed Under: Sensors and Detectors Tagged With: 555, Battery, Indicator

How to Collect Electromagnetic Energy from Atmosphere

Last Updated on January 21, 2026 by Swagatam 132 Comments

freeenergycollectorcircuit 1

A free energy collector circuit helps to convert surrounding radio frequency waves to electric power and can provide 40 watts to 10 watts indefinitely. The Circuit Concept An option to increase the output power is achievable through proper set-up of an antenna. Placing an antenna in a close proximity of a large metal object helps […]

Filed Under: Renewable Energy Tagged With: Atmosphere, Collect, Energy, Free

Inductive Energy Receiving Concept – Tesla Coil Concept

Last Updated on January 21, 2026 by Swagatam 14 Comments

free

For a novice, to understand more on Free Energy Receiver concept, let’s consider a solar-electric panel; widely used as an alternative to electrical energy. Discussing Nikola Tesla’s Free Energy Concepts The invention of Nikola Tesla differs, but the closest thing to his invention can be found in a conventional energy – the photo-voltaics. One major […]

Filed Under: Energy from Magnets Tagged With: Coil, Concept, Energy, Free, Receiving, Tesla

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