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SMPS and Converters

How to Design Simple LED Driver Circuits

Last Updated on June 8, 2026 by Swagatam 103 Comments

capacitive LED driver with 50 LEDs

In this article I have explained how to design your own customized, simple LED driver circuits at home. We will learn how to calculate specific LED configurations for applying the LEDs with appropriate LED driver power supplies. In these driver power supplies I have explained two concepts one by using SMPS boards and the other […]

Filed Under: Lamps and Lights, SMPS and Converters Tagged With: Circuits, Design, Driver, LED, Simple

Build Customized 220V Flyback SMPS Circuits: 12V, 5A, 60W Example Discussed

Last Updated on June 8, 2026 by Swagatam Leave a Comment

In this post I will explain you all the simple formulas, step by step, which you can use for designing and building professional grade 220V AC SMPS flyback converter circuits. As we know the SMPS transformer is the heart of an SMPS design, so here we will learn all the steps, one by step, using […]

Filed Under: SMPS and Converters Tagged With: 220V, Build, Circuits, Customized, Flyback, SMPS

Make this DIY Spot Welding Machine using MOT and IC 555

Last Updated on June 6, 2026 by Swagatam Leave a Comment

Building a spot welding machine at home, it does not really need those complex SMPS circuits or costly stuff, nope. Instead a much simpler way is there, which people use, and it works quite well. We can use a microwave oven transformer, that MOT, and then add a small timing circuit with it, so now […]

Filed Under: SMPS and Converters Tagged With: 555, DIY, Machine, MOT, Spot, Welding

SMPS Spot Welding Circuit using IC SG3525 Explained

Last Updated on June 4, 2026 by Swagatam 2 Comments

Spot welding needs very low voltage but very high current, that too for very short time, so now this whole thing is built around that idea. In this design we push big current in small time period for safely creating the required welding joint, done. Audio/Video Representation How the Circuit Works Now the circuit, it […]

Filed Under: SMPS and Converters Tagged With: Explained, SG3525, SMPS, Spot, Welding

12V, 5 Amp SMPS Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 500 Comments

12v2B52Bamp2Btransformerless2Bbattery2Bcharger2Bcircuit

In this article we study a simple flyback based converter design which is implemented as an SMPS 12V, 5amp battery charger power supply, without using a iron core transformer. How it Works The proposed 12V, 5 amp smps battery charger circuit employs a flyback converter topology which results in the required smps based high current, […]

Filed Under: Battery Charger Circuits, SMPS and Converters Tagged With: 12V, Battery, Charger, SMPS

220V AC to 56V DC SMPS Circuit for 48V Battery Charging

Last Updated on May 17, 2026 by Swagatam 2 Comments

In this article we will try to understand how to build a 220V AC to 48 V DC SMPS circuit for charging all types of 48V batteries, using the nice little IC IR2153. However, since 48V battery will require a 56V DC, so we will rather discuss a 220V to 56 V DC battery charger […]

Filed Under: Battery Charger Circuits, SMPS and Converters Tagged With: 220V, 48V, 56V, AC, DC, SMPS

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