This project is a 8×8 LED matrix controlled by an Arduino using 4 shift registers. The shift registers are 8-bit wide and are easily interfaced with the SPI protocol. Pulse width modulation is used to mix the colors.
8×8 RGB LED Matrix - [Link]
This project consists of LED strips mounted on an outdoor trellace which functions as a lightning simulator, outdoor breathalyzer, graphic equalizer synced to music, and a few other effects with sound. The system is controller by an Arduino. [via]
The Lightning Simulator / Breathalyzer / Graphic Equalizer – [Link]
This project is a very small virtual rotating led beacon build using 4 x 0603 SMD LEDs and it takes place of about 2,5 mm3. LEDs are controlled by a PIC12F629 and drives each led by a PWM signal. See the virtual rotating effect on the video above.
Virtual rotating LED beacon – [Link]
This project describes how to build a PWM driver to control four LEDs from one small Microchip 12F609 board. Following this instructable you get all the information needed to program your own Microchip 12F609 microcontroller, connect some LEDs and have your PC command some LED action.
Open Source Microchip LED / PWM Driver Project – [Link]
This project is a great little LED portable game system based on PIC16F628A. It is equipped with a 4×4 LED matrix, a PIC microcontroller, 9 bipolar transistors, 4 buttons for control and one switch to power on. It is also has a small speaker to generate game sound. It is powered from 4 Ni-MH batteries. Check this instructable on the link below. So far it has only three games programed.
Portable Led Game System – [Link]
The LED series/parallel array wizard is a calculator that will help you design large arrays of LEDs. You specify the source voltage, the led forward voltage, the led current and the number of LED and the calculator computes the schematic and resistor values. Check it out!
LED Wizard calculates resistors and draws schematic - [Link]
This project is a 8 LED chaser based on PIC16F628 and uses simple parts like resistors, leds and a switch. Check schematic and source code on the link below.
8 Led UFO Chaser – [Link]
You may already be familiar with the Larson Scanner kit but this project moves a step further. It is an extendable and expandable version of the open-source Larson Scanner, from Evil Mad Scientist Laboratories. Evil Mad Scientist Laboratories modified it a bit with some custom wiring and new code to allow a person to link multiple units together.
The Expandable Larson Scanner! – [Link]