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DSO138: Best Small Oscilloscope for Electronic Hobbyists

Last Updated on June 8, 2026 by Swagatam 29 Comments

DSO138 oscilloscope button specifications

An oscilloscope is a device that measures and analyses signals in circuits. It’s an indispensable equipment for everyone who works with electronic circuits since it enables them to see the activity of a wave in real – time basis. The DSO138 is one of the most popular oscilloscopes on the market today. We’ll give a […]

Filed Under: Meters and Testers Tagged With: Best, DSO138, Electronic, Hobbyists, Oscilloscope, Small

3 Best Joule Thief Circuits

Last Updated on June 8, 2026 by Swagatam 127 Comments

JouleThiefbyStevenChiverton

A joule thief circuit is basically an efficient, self-oscillating voltage booster circuit, built using a single transistor, resistor and an inductor, which can boost voltages as low as 0.4 V from any dead AAA 1.5 cell, to much higher levels. Technically it may seem impossible to illuminate a 3.3 V LED with a 1.5V source, […]

Filed Under: Lamps and Lights Tagged With: Best, Circuits, Joule, Thief

2 Best Current Limiter Circuits Explained

Last Updated on June 1, 2026 by Swagatam 335 Comments

precisioncurrentlimiter

In this post I have explained 2 simple universal current controller circuits which can be used for safely operating any desired high watt LED. The universal high watt LED current limiter circuit explained here can be integrated with any crude DC supply source for getting an outstanding over current protection for the connected high watt […]

Filed Under: Lamps and Lights Tagged With: Best, Circuits, Current, Explained, Limiter

5 Best 6V 4Ah Automatic Battery Charger Circuits Using Relay and MOSFET

Last Updated on May 17, 2026 by Swagatam 337 Comments

The following 5 versions of 6 volt 4 AH battery charger circuits has been designed by me and posted here in response to the request from Mr. Raja, I have explained the whole conversation. Technical Specifications “Dear sir, please post a circuit to charge 6 volt 3.5 ah lead acid battery from 12 volt battery. […]

Filed Under: Battery Charger Circuits Tagged With: 4Ah, Automatic, Battery, Best, Charger, Circuits

5 Best 40 Watt Amplifier Circuits Explored

Last Updated on May 15, 2026 by Swagatam 26 Comments

40 watt amp

In this post I will talk about 5 outstanding, easy to build, low distortion Hi-Fi 40 watt amplifier circuits that can be further upgraded to higher wattage through some minor tweaks. This article was contributed to me through email by a dedicated follower Although you may find several hybrid output modules available, hardly any of […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Best, Circuits, Explored, Watt

50 Best Arduino Projects for Final Year Engineering Students

Last Updated on May 14, 2026 by Swagatam 2 Comments

budding engineers

In this post we sort out a list of most popular, 50 hand-picked and best engineering circuit Arduino projects specially created for all aspiring engineers for their final year project exhibition. The circuit projects include the latest and advanced microprocessor Arduino based designs with full program code. The list also includes projects using discrete parts […]

Filed Under: Arduino Projects Tagged With: Arduino, Best, Engineering, Final, Projects, Year

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