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Newly Updated Circuit Projects:

7 Watt LED Driver SMPS Circuit – Current Controlled

Last Updated on July 5, 2025 by Swagatam 27 Comments

72Bwatt2Bled2Bdriver

The presented 7 watt LED driver circuit is an SMPS based non-isolated, transformerless circuit which ensures a safe current controlled output for the attached LED, it is very affordable to build without  involving complex transformer winding. Constant Current and Load Regulation Objective The aim behind the design of the IC TPS92310 (from TEXAS INSTRUMENTS) is […]

Filed Under: SMPS and Converters Tagged With: Controlled, Current, Driver, LED, SMPS, Watt

Mp3 Player Using DF Player – Full Design Details

Last Updated on May 25, 2026 by Swagatam 30 Comments

3 2

In this post I will show how to construct an Mp3 player using arduino and DFPlayer. The proposed article has two Mp3 player designs, one with push button control and another one with IR remote control. We will also take a look at DFPlayer (Mp3 player module) and its specifications. We all love music, we […]

Filed Under: Arduino Projects, Audio and Amplifier Projects Tagged With: Design, Details, DF, Full, Mp3, Player

LiFi Internet Transmitter Circuit – USB Signal Transfer through LED

Last Updated on July 27, 2020 by Swagatam 65 Comments

feaafaf10bf86605998d68782fbfc074

In this post I have explained how to transmit Internet data through LiFi using a class D amplifier as the transmitter and an ordinary audio amplifier circuit as the receiver. How Li-Fi Concept Works If you are wondering how a LiFi concept could be used for transmitting USB data, this article will provide with all […]

Filed Under: Wireless Circuits Tagged With: Internet, LiFi, Signal, Transfer, Transmitter, USB

Making a Single Channel Oscilloscope using Arduino

Last Updated on June 8, 2026 by Swagatam 24 Comments

lcdconn

In this interesting post, we are going to make a simple single channel oscilloscope using Arduino and a personal computer, where the waveforms will be showcased on the PC’s display and frequency and time period of the input waves will be displayed on the 16 x 2 display.  Introduction Every electronics enthusiast once said “I […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: Arduino, Channel, Making, Oscilloscope, Single

Arduino Frequency Meter Using 16 x 2 Display

Last Updated on June 8, 2026 by Swagatam 4 Comments

arduinodisplayconnection

In this article I will show how to construct a digital frequency meter using Arduino whose readings will be showcased on a 16 x 2 LCD display and will have a measuring range from 35 Hz to 1MHz. Introduction Being electronics enthusiast, we all would have come across a point where we need to measure […]

Filed Under: Arduino Projects, Meters and Testers Tagged With: 16x2, Arduino, Display, Frequency, Meter

Arduino Pure Sine Wave Inverter Circuit with Full Program Code

Last Updated on May 14, 2026 by Swagatam 662 Comments

arduino

This article explains a simple pure sine wave inverter circuit using Arduino, which could be upgraded to achieve any desired power output as per the user’s preference. Circuit Operation In the last article I have explained how to generate sine wave pulse width modulation or SPWM though Arduino, we are going to use the same […]

Filed Under: Arduino Projects, Inverter Circuits Tagged With: Arduino, Full, Inverter, Pure, Sine, Wave

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