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Transformerless Power Supply Circuit using MJE13005

Last Updated on July 7, 2023 by Swagatam 78 Comments

transformerlesspowersupplycircuitusingmje13005

The following article presents a very simple low current 220 V mains operated transformerless power supply circuit using an inexpensive MJE13005 transistor and few other passive electronic components. As can be witnessed in the given circuit diagram, the design is extremely straightforward. How it Works Transistor T1, which is a high voltage NPN transistor MJE13005 forms the […]

Filed Under: Power Supply Circuits Tagged With: MJE13005, Power, Supply, Transformerless

Homemade Solar MPPT Circuit – Poor Man’s Maximum Power Point Tracker

Last Updated on February 24, 2020 by Swagatam 200 Comments

simplempptchargercircuit

MPPT stands for maximum power point tracker, which is an electronic system designed for optimizing the varying power output from a solar panel module such that the connected battery exploits the maximum available power from the solar panel. Introduction NOTE: The discussed MPPT circuits in this post do not employ the conventional control methods like “Perturb and […]

Filed Under: Solar Controller Circuits Tagged With: Homemade, Maximum, MPPT, Poor, Power, Solar

High Current Transformerless Power Supply Circuit

Last Updated on February 13, 2025 by Swagatam 364 Comments

The simple configuration of a transformerless power supply circuit presented below is able to provide high current at any assigned fixed voltage level. The idea seems to have solved the problem of deriving high current from capacitive power supplies which earlier seemed a difficult proposition. Introduction I have discussed a few transformerless power supply circuits […]

Filed Under: Power Supply Circuits Tagged With: Current, High, Power, Supply, Transformerless

Make this Amplifier Power Meter Circuit

Last Updated on June 8, 2026 by Swagatam 6 Comments

amplifier power meter circuit 1

Music Amplifiers have always intrigued us due to their massive amplifying capabilities which completely changes the dimensions of the delivered music outputs. Fundamentally it’s the power of the amplifier that’s always on the scanner and we find folks getting too obsessed by the power rating of their procured amplifier unit. Introduction However many of us […]

Filed Under: Meters and Testers Tagged With: Amplifier, Meter, Power

Add this Short Circuit Protection to Your Power Supply

Last Updated on October 14, 2022 by Swagatam 107 Comments

simple short circuit protection for power suppllies using relay

A rather cheap yet reasonably effective short circuit protection circuit is I have explained below which can be used for safeguarding power supply circuit Introduction A power supply unit is an indispensable unit for every electronic enthusiast and engineers working in the relevant field. Though today all of us use hi-tech power supply units having […]

Filed Under: Power Supply Circuits Tagged With: Power, Protection, Short, Supply

Designing Simple Power Supply Circuits

Last Updated on January 2, 2024 by Swagatam 164 Comments

power2Bsupply2Bcircuit2Busing2Bsingle2Bdiode

In this post I have explained how to design and build a simple power supply circuit right from the basic design to the reasonably sophisticated power supply having extended features. Power Supply is Indispensable Whether it’s an electronic noob or an expert engineer, all require this indispensable piece of equipment called the power supply unit. This is because no electronics […]

Filed Under: Power Supply Circuits Tagged With: Circuits, Designing, Power, Simple, Supply

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