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Newly Updated Circuit Projects:

Wireless Servo Motor Control Using 2.4 GHz communication link

Last Updated on August 6, 2026 by Swagatam 29 Comments

Receiver12312 2

In this post I will show how to construct a wireless servo motor circuit which can control 6 servo motors wirelessly on 2.4 GHz communication link.  Introduction The project is divided into two parts: a transmitter with 6 potentiometers and a receiver circuit with 6 servo motors. The remote has 6 potentiometers to control 6 […]

Filed Under: Arduino Projects, Motor Controller Tagged With: communication, Control, Link, Motor, Servo, Wireless

200, 600 LED String Circuit on Mains 220V

Last Updated on June 8, 2026 by Swagatam 43 Comments

string 1

In this post I have explained the construction of a 200 to 600 LED circuit project, using series parallel  LEDs for creating an alphabetical display sign board. The idea was requested by Mr. Mubarak Idris. Circuit Objectives and Requirements I need a blinking LED light that show”WELCOME TO” blink and then “COLLEGE OF ENGINEERING” base […]

Filed Under: Lamps and Lights Tagged With: 200, 220V, 600, LED, Mains, String

Inverter Voltage Drop Issue – How to Solve

Last Updated on December 21, 2021 by Swagatam 116 Comments

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Whenever PWM is employed in an inverter for enabling a sine wave output, inverter voltage drop becomes a major issue, especially if the parameters are not calculated correctly. In this website you might have come across many sine wave and pure sine wave inverter concepts using PWM feeds or SPWM integrations. Although the concept works […]

Filed Under: Inverter Circuits Tagged With: Drop, Inverter, Issue, Solve, Voltage

Transformerless AC Voltmeter Circuit Using Arduino

Last Updated on June 8, 2026 by Swagatam 13 Comments

simulation2B1 1

In this article I have explained how to make a transformerless AC voltmeter using Arduino. Making an analog voltmeter is not an easy task as to build one you must have good knowledge of physical quantities like torque, speed; which can be very difficult when it comes to their practical applications. By Ankit Negi But […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: AC, Arduino, Transformerless, Voltmeter

LCD 220V Mains Timer Circuit – Plug and Play Timer

Last Updated on May 14, 2026 by Swagatam 12 Comments

Sockettimer

In this post we are going to make an LCD 220 V mains operated timer using Arduino whose countdown time can be witnessed via 16 x 2 LCD display. Introduction The proposed LCD timer circuit is general purpose timer with display and few buttons for setting the time. Once the time is set output goes […]

Filed Under: Arduino Projects, Timer and Delay Relay Tagged With: 220V, LCD, Mains, Play, Plug, Timer

110V, 14V, 5V SMPS Circuit – Detailed Diagrams with Illustrations

Last Updated on July 5, 2025 by Swagatam 29 Comments

smps

In this post I have explained how to apply the IC L6565 for making a compact multi purpose 110V, 14V, 5V SMPS circuit using minimum number of external components. Implementing quasi-resonant ZVS flyback The IC L6565 from ST Microelectronics is designed as a current-mode primary controller chip, to specifically suit quasi-resonant ZVS flyback converter applications. The […]

Filed Under: SMPS and Converters Tagged With: 110V, 14V, Detailed, Diagrams, Illustrations, SMPS

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