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Design

PFC (Power Factor Correction) Calculator Tool: 3kW

Last Updated on September 21, 2026 by Swagatam 12 Comments

In this post I will explain how to use this active PFC calculator for calculating high current, high PFC designs. In our example we will be using 230 VAC input and 3 kW output and Vout equal to around 390 V, and we will try to see how each resistor and capacitor gets calculated in […]

Filed Under: Grid and 3-Phase, Power Supply Circuits, SMPS and Converters, Voltage Control and Protection Tagged With: 3KW, Calculator, Design, High, PFC, Power

How to Design Customized 220V SMPS Circuits

Last Updated on September 28, 2025 by Swagatam 4 Comments

We many times think that how we can make a SMPS circuit, and we feel that this is very complex. But that is not so because we can do this by following simple manual calculations step by step. We only need to know that SMPS design is always starting from the transformer. We cannot make […]

Filed Under: Power Supply Circuits, SMPS and Converters Tagged With: 220V, Circuits, Customized, Design, SMPS

Design your own Sine Wave Inverter Circuit from the Scratch [Tutorial]

Last Updated on November 30, 2025 by Swagatam 51 Comments

the right way to interface SPWM with inverter MOSFETs

In this article I have explained comprehensively regarding how to design a sine wave inverter without any form of coding or complex circuit designs. The included designs are simple yet extremely precise with their sine waveform structure. You might have often felt discouraged, thinking that making a sine wave inverter from the scratch can be […]

Filed Under: Inverter Circuits Tagged With: Design, Inverter, Scratch, Sine, Tutorial, Wave

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

How to Design a Bench Power Supply Circuit

Last Updated on March 4, 2026 by Swagatam 189 Comments

In this post I have explained how an effective and efficient, yet very cheap, and stabilized bench power supply can be designed by any electronic hobbyist for safely testing all types electronic projects and prototypes. The main features that a bench power supply must have are: Audio/Video Representation General Description The majority of the power […]

Filed Under: Power Supply Circuits Tagged With: Bench, Design, Power, Supply

How to Design MOSFET Power Amplifier Circuits – Parameters Explained

Last Updated on May 15, 2026 by Swagatam 15 Comments

BJT vs MOSFETs

In this post I have explained various parameters that must be considered while designing a MOSFET power amplifier circuit. We also analyze the difference between bipolar junction transistors (BJT) and MOSFET characteristics and understand why MOSFETS are more suitable and efficient for power amplifier applications. Contributed by Daniel Schultz Overview When designing a power amplifier […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Circuits, Design, MOSFET, Parameters, Power

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