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Newly Updated Circuit Projects:

How to Interface Cellphone Display with Arduino

Last Updated on February 9, 2026 by Swagatam Leave a Comment

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In this post we will be learning how to interface Nokia 5110 display with arduino microcontroller and how to display some text, we will also be constructing a simple digital clock and finally we will be exploring graphical capabilities of the Nokia 5110 display. Nokia was the most popular mobile phone brand across the globe […]

Filed Under: Arduino Projects Tagged With: Arduino, Cellphone, Display, Interface

Mp3 Player Using DF Player – Full Design Details

Last Updated on February 9, 2026 by Swagatam 20 Comments

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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

Make this EV Battery Charger Circuit

Last Updated on February 7, 2026 by Swagatam Leave a Comment

In this post I will explain how to build and test a homemade yet very professional looking high power EV battery charger transmitter circuit using H-bridge fixed-frequency AC inverter topology, driving a series-resonant LC tank. I will also explain how to build a complementing EV charger receiver circuit for receiving the charging current from the […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Charger, EV

Simple 220V RGB LED Bulb Circuit for Christmas, Diwali Decoration

Last Updated on February 7, 2026 by Swagatam Leave a Comment

In this post I will explain this 220V RGB slow fading LED bulb circuit step by step and we can start from the left side and slowly move toward the right side so that you can understand what each block is doing. We use many parts like 555, 4017, 33uF, D1 to D4, and others […]

Filed Under: Lamps and Lights Tagged With: 220V, Bulb, Christmas, LED, RGB, Simple

8 Channel Lighting Sequence Generator Circuit for Christmas, Diwali Decoration

Last Updated on February 7, 2026 by Swagatam 6 Comments

In this post I will explain how to make one full adjustable lighting sequence generator which can control and illuminate many external bulbs through triacs in many different running patterns. We can make it so that user can change and select any sequence pattern easily. We will use Arduino for the full control part. Let […]

Filed Under: Arduino Projects, Lamps and Lights Tagged With: Channel, Christmas, Diwali, Generator, Lighting, Sequence

DPDT Relay Working, Pinouts, Testing Explained

Last Updated on February 7, 2026 by Swagatam 2 Comments

In this post we are going to understand about how this DPDT relay actually works, how we identify its pinouts, and how we can use it in our projects. We shall go step by step so that you can feel confident with every small thing about it. Introduction We know that a DPDT relay means […]

Filed Under: Electronics Theory Tagged With: DPDT, Explained, Pinouts, Relay, Testing, Working

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