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Newly Updated Circuit Projects:

How to Make a Solar Cell from a Transistor

Last Updated on January 23, 2024 by Swagatam 7 Comments

2N3055 into solar cell

The majority of newbie electronic hobbyists would certainly have a couple of burned up power transistors such as 2N3055 hiding inside their junk box. Supposing we have their internal semiconductor junctions still intact, the device could be transformed into a nice little solar cell by filing or sawing off the top cap of the device, […]

Filed Under: Solar Controller Circuits Tagged With: Cell, Solar, Transistor

12 V to 30 V High Current Boost Converter Circuit [Variable]

Last Updated on July 5, 2025 by Swagatam 9 Comments

DC to DC converter

In this post I have explained how to make a high current boost converter circuit which will step up a 12 V DC to any higher level up to 30 V maximum, and at an impressive 3 amp current rate. This high current output can be further enhanced by suitably upgrading the inductor wire gauge […]

Filed Under: SMPS and Converters Tagged With: Boost, Converter, Current, High, Variable

Grid Dip Meter Circuit

Last Updated on June 8, 2026 by Swagatam 30 Comments

Gang pin details

A dip meter or a grid dip meter can be considered as a kind of frequency meter whose function is to determine the resonant frequency of an LC circuit. For this, the circuits don’t have to ‘radiate’ any waves or frequency across each other. Instead, the procedure is implemented simply by placing the coil of […]

Filed Under: Meters and Testers Tagged With: Grid, Meter

Diac – Working and Application Circuits

Last Updated on May 20, 2026 by Swagatam 2 Comments

Diac bidirectional breakover characterictics

The diac is a two-terminal device having a combination of parallel-inverse semiconductor layers, which allows the device to be triggered through both directions regardless of the supply polarity. Diac Characteristics The characteristics of a typical diac can be seen in the following Figure, which distinctly reveals the presence of a breakover voltage in across both […]

Filed Under: Electronics Theory Tagged With: Application, Circuits, Diac, Working

Automotive LED Driver Circuits – Design Analysis

Last Updated on May 16, 2026 by Swagatam 38 Comments

telltale lights automotive

In cars or automobiles, LEDs have grown to be the preferred choice of lighting. Whether it’s the rear tail-lights or the tell-tale indicators in the cluster as indicated in Figure 1 below, all incorporate LEDs nowadays. Their compact dimensions helps versatility in design and offers the prospective to be as durable as the vehicle’s life […]

Filed Under: Automobile Electronics Tagged With: Analysis, Automotive, Circuits, Design, Driver, LED

How to Kill Coronavirus with Ozone Gas Generator

Last Updated on May 24, 2026 by Swagatam 88 Comments

coronavirus real image

In this post I have explained the basic construction of an ozone generator apparatus for disinfecting a closed premise from dangerous viruses such as coronavirus. Ozone is a tested and an officially recommended method of eliminating viruses and pathogens on outside surfaces. Viruses Cannot be Killed with Medicines The fact that makes a typical influenza […]

Filed Under: Health related Projects Tagged With: Coronavirus, Generator, Kill, Ozone

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