LED

A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with high light output.

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LED Booster for Microcontrollers

“There’s many a time when you want to connect a white LED to a microcontroller operating from a 3 V supply voltage. Unfortunately, this doesn’t work and your nice white LED only lights up feebly or not at …

Simple Pocket Light

“You may have seen plenty of these simple lights all over the place (instructables/youtube), This is nothing different really but just sharing what I made. This project uses very few materials and is very simple to make. My soldering …

LED Sculpture: Let’s Build an LED Man!

“The words LED and sculpture seem oddly placed together, dont they. Well, what if you could learn about basic electronic elements, and at the same time, channel your inner creativity by making sculptures? Paper Crane Lab teaches you how to …

10 Band Led Spectrum Analyzer

“Good afternoon, dear viewers and readers. Today I want to show you the complete assembly guide for the 10 band LED spectrum analyzer. Brief Overview of the Technical Features of the Spectrum Analyzer. 1.The reading value is in the …

Building a ‘papercraft’ LED marquee

“Long, dark winter nights demand some tinkering and crafts. Arduino LED projects are fun, but custom circuit boards might not always be in the budget. Thankfully, discrete LEDs can be found on Ebay for less than 1¢ apiece, and cardboard …

How to Make a Mini Bug Robot in 5 Minutes

“In this project, we will make a simple tiny bug robot using some basic components. You will need 5 to 10 minutes to make this simple moving mini bug robot. Supplies:1. a DC motor [5-9v] [or a vibration motor …

Bow Tie PCB Badge

“Every party is different, and everyone wants to be unique, what do you think about wearing a printed circuit board bow tie? PCB badges have always been an artistic form of circuit board.I this project I will be showing …

How to Make LED Chaser Using NE555 IC BC547

“Today I am going to make an LED Chaser circuit using NE555 IC and BC547 Transistor.This LED Chaser is different from other LED Chasers circuit. Let’s get started,”

LED multiplexing layouts for hand-crafting

“Have you ever wanted to build a LED matrix display using hand-crafting methods, such as sewing, weaving, or papercraft? Designing and fabricating complex LED projects by hand, while making use of limited input-output (i/o) pins on microcontrollers/Arduino, is …

Project  LED Jewelry

LED Jewelry

“Create yourself a unique necklace or earrings that will glow in the dark!”