The LoL Shield for Arduino is a charlieplexed LED matrix for the Arduino. All the LEDs are individually addressable, so you can use it to display anything in a 9×14 grid. Scroll text, play games, display images, or whatever else you want with the Lots of LEDs shield.
LoL (Lots of LEDs) Shield for Arduino – [Link]
This project shows how to build a PCB UV exposure box using UV LEDs and digital multifunction timer. Check details on the link below.
PCB Photographic Artwork Transfer UV Cabinet – [Link]
Jacques Lebrac build a UV LED exposure box using only one LED. The led used is a 5W unit, emits at 400 nm UV and needs 1.5A of current. As a heatsink he used an aluminum arm that also supports the LED on proper distance. A LM117 is used to regulate the power driving the LED. [via]
Single LED UV PCB exposure box - [Link]
Mike Shatohin build this LED Ambient lighting named AmbilightUSB. It uses a ATtiny44, 4 RGB leds, 74HC595 and USB connectivity. It is able to analyze the computer screen color information and reproduce the screen colors on the back of the screen. The software is cross-platform and can be run on Linux or Windows. Check schematic and details on the link below.
AmbilightUSB: Ambient lighting to your computer – [Link]
This project is a LED lighting system that is able to pulse with the music bit. It is based on Arduino and a PC for signal processing. The audio output is fed to the PC and a script is making the process and calculates the light levels which then are send to Arduino. Arduino is controlling the LEDs via a control board. The system has four LED modules that each have two 4-channel LEDs (red, green, blue, white), this means that is required 32 PWM signals to control all the LEDs. To achieve that the author used 2x TLC5940 16-channel PWM chips. These ICs act like cascading shift registers. Check details on the link below. [via]
Audio controlled LED party lights - [Link]
This is a constant current led driver kit. This provides a constant amount of power to the LEDs driving the LEDs with 300mA of current. Maximum supply voltage should be less than 40 volts, max watts (Watts = Volts x Amps) through the circuit is 2000 milliwatts.
Constant Current Bright LED driver - [Link]
This project is an RGB Superflux LED mirror based on ATMEGA8 AVR microcontroller and 16 RGB LEDs. LEDs are controlled by the microcontroller and combines the three basic colors (RED, GREEN, BLUE) to produce the rest colors. The color depth is 1 bit, that means it is on or off, so there are 8 colors in total including the white and black.
Superflux LED RGB Mirror – [Link]
J Bremnant used two 16×24 led matrix boards and wrote code to make them display information of trading environment. He wanted to make something flexible that can make the best out of LED. He not only wanted scrolling text messages, but render monochrome animations and images through it. To drive the display he used Teensy 2.0 and the code is under 8K as graphics are manipulated on PC.
Led Matrix Canvas – [Link]