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LED String Series Resistor Calculator

Last Updated on January 11, 2026 by Swagatam Leave a Comment

Want to know the exact current limiter resistor value for a specific LED series string? You can now use this calculator toll to quickly get the precise LED series string resistor value. Calculator by homemade-circuits.com LED Series Resistor Calculator Supply Voltage (Volts) LED Forward Voltage (Volts) LED Current (mA) Number Of LEDs In Series Calculate […]

Filed Under: Lamps and Lights Tagged With: Calculator, LED, Resistor, Series, String

230 Volts Bulb String Light Circuit for Diwali and Christmas

Last Updated on September 20, 2025 by Swagatam 33 Comments

diwali 2

In this article I have explained how to wire tiny 12 volt flashlight bulbs into decorative string light for decorating houses during festivals like Diwali and Christmas. What are String Lights As the name suggests a string light is a wired lamp system in which many lamps such as bulbs or LEDs are joined together […]

Filed Under: Lamps and Lights Tagged With: 230, Bulb, Diwali, Light, String, Volts

12V LED String Light Flasher Circuit for Christmas Decoration

Last Updated on September 20, 2025 by Swagatam 14 Comments

flasher

Looking for a simple 12 V LED string light flasher circuit for your next Christmas decoration project? Learn how easy it is to build a LED wig wag string light flasher using just a couple of transistors and few other passive components. LED Flashing String Lights for Decorating Homes A LED flasher schematic has also […]

Filed Under: Lamps and Lights Tagged With: 12V, Christmas, Flasher, LED, Light, String

220V/120V LED String Light Circuit using a Single Capacitor

Last Updated on January 19, 2025 by Swagatam 67 Comments

ACledstring

In this post I have explained how to make a LED string light which can be operated from 220V mains through a single inexpensive PPC capacitor. The idea was requested by Mr. Basit Momin.WE STRICTLY CAUTION YOU THAT YOU BUILD THIS CIRCUIT ONLY IF YOU ARE AWARE OF THE DANGERS OF MAINS AC AND KNOW […]

Filed Under: Lamps and Lights Tagged With: 120V, 220V, LED, Light, Single, String

200, 600 LED String Circuit on Mains 220V

Last Updated on January 19, 2025 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

Converting Ordinary Rice Bulb String Light to LED String Light

Last Updated on September 8, 2020 by Swagatam 12 Comments

In this post we study how to convert a rice bulb string light into an LED string light using some simply circuit modification. Circuit Concept Whether it’s during a  festive occasion or for mere decoration purpose, the Chinese rice bulb flashing lights have become  hugely popular nowadays These can be seen as multiple interlaced wire strings consisting of many different […]

Filed Under: Lamps and Lights Tagged With: Bulb, Converting, Light, Ordinary, Rice, String

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