Here’s Embedded Lab’s new PIC project: Making a 8×40 LED matrix marquee using shift registers: This project is about constructing a mono-color LED matrix display board that consists 320 LEDs arranged in 8 rows and 40 columns. The heart of … Read more
Get in touch with your things – Souliss: The future of lights goes through LEDs because compared to standard lights they’re tiny, easy to control and consume low power. But what we were missing until now was a powerful yet … Read more
Embedded-Lab is doing a series of tutorials for the Netduino. The Day 7 tutorial of a series is RGB LED color formation using Pulse Width Modulation: Pulse Width Modulation (PWM) is a digital method of delivering a varying amount of … Read more
Here’s an Instructable by ASCAS: Phone macro photography (HQ – using LED lens) You can purchase some macro lenses for your phone camera but with a bit of work and a spare LED lens you can make your own. Only thing … Read more
Power efficient, adjustable, light-sensitive switch using an LED: You can use an LED as a photoelectric sensor. A previous Design Idea shows that such a switch is highly power-efficient, consuming almost no power (Reference 1). However, you cannot adjust that … Read more
Here’s a unique mobile POV device using the Parallax Propeller. Gareth (chiprobot) designed this gadget using the Propeller MCU driving eight UV LEDs, blasting UV light onto a phosphorescent sheet of vinyl. He says the coding utilizes the Propeller’s built-in … Read more
In this video Nick Johnson demonstrates his tiny Minimatrix project and wrote a detailed explanation describing the build: While minimatrix is in principle a pretty simple device, there’s a surprising amount of detail that goes into getting it right – … Read more
Tronixstuff has a review of “Magpie” Arduino Uno-compatible board from Little Bird Electronics: Starting with the subject of this review – the “Magpie” board from Little Bird Electronics in Australia. It seems that a new Arduino-compatible board enters the market … Read more
Here’s an interesting project by Steve of Tangent Audio the AZIZ project, a microcontroller-based LED microscope illuminator: AZIZ is an LED microscope illuminator that I designed and built from scratch. It is designed around a Texas Instruments TLC59116 constant-current PWM LED … Read more
Rave shades: The self assemble LED glasses kit These Rave Shade – LED Glasses look like a ton of fun. They are Arduino based and use 74HC595 shift registers to light all the LEDs. At first I though it was … Read more
Parallax Propeller guru Phil Pilgrim has posted this IR sensor/discriminator project on the Parallax Propeller forums. “Almost everyone here is aware of the advantages of modulated IREDs for rejection of background IR fluctuations and line-frequency noise from artificial lighting. Typically, … Read more
MobileWill built this LED Matrix link project for his wedding: i just wanted to share my latest project for my wedding but i have also listed on tindie. I made a easy way to use the led matrix with the max7219. … Read more
Paul over at Dorkbotpdx has written an article about his 7-segment countdown timer: The main challenge was driving the LEDs with a constant current, because they need about 10.5 volts across the several series LEDs. I wanted to run from … Read more
Introduction to home automation: We have all see some complex home automation systems, this video made by Jeremy from The Custom Geek gives a good overview of what is involved behind the scenes. This system lives in the garage and … Read more
Here’s a simple adjustable current source with a PNP transistor that drives either one or two LEDs for testing and/or intensity matching purposes. The current is from 2 to 16 mA in four steps using a rotary switch. While this … Read more
Tobias Floery built this RGB pixel clock and wrote a detailed explanation describing the build. These RGB Pixels look like they are fun to work with since they are so versatile. Tobias Floery is having some fun building an RGB … Read more
Embedded Lab’s new version of MAX7219 based 4-digit serial seven segment LED display: This (SPI7SEGDISP4.40-1R) is a revised version of the previous SPI seven segment LED display (4 digit) board that displayed numerals and decimal points. The new version has … Read more
Macroblock MBI5030, is a 16 channel constant current LED driver with PWM output, and a SPI-like interface, it requires external grayscale clock though. The problem: you need the chip to figure out if your code actually works. And you also … Read more
Digital reversi board by Hanting Lu and Kai Wang from Cornell University, built as a final project: For our final project in ECE 4760, we designed and implemented a Reversi board consisting of hardware, a microcontroller, and a touch screen. … Read more
Clint Stevenson and his son built this animatronic robot head for his Valentine’s Day treat box for school and wrote up the build on the Casco Logix blog. He relates, “The blog post doesn’t talk about or show the body … Read more
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