
The goal was to design a home made LED Display that can be expanded to bigger sizes with minimal costs. Unlike other systems, on this one the image gets scanned mechanically and the image is created by using the POV effect (persistence of vision). There are 32 RGB LED used in the project but you can easily increase the number of LED’s. The author attached the system to a spinning fan, and the images started to appear.
ATmega16 RGB LED Display: [Download Project] - [View Project PDF] - [Via]

A master-controller board and three stepper motor driver boards drive this well-designed PCB drill machine. There are four single-sided boards each featuring an ATmega16/32 microcontroller. The master controller initiates and controls all communication. The result ? you drill your PCB’s precisely at the right spot.
3 axis PCB Drill: [Download Project] - [View Project PDF] - [Via]

This project uses an ATmega16 and a radio control kit to get the job done. You can control up to four servo(motors) with a simple push of a button. The system can also control a servo with a photocell, for example if you enter its range it will turn on a light. Of-course there are a few commercial alternatives but the price is quite high and many of them are not a versatile as this one.
Garage Door Control System (or any device radio controll system): [Download Project] - [View Project PDF] - [Via]

If you built a rocket, you might need some sort of control system, at least for the parachute deployment. Take a look at this Atmega16-based rocket controller which is designed for use in water rockets and various other rocket designs. The well-designed controller enables you to log the rocket’s performance (e.g., altitude and acceleration) and control of the parachute deployment system.
Rocket Controller based on Atmega16: [Download Project] - [Via]

The AVR robot controller (ARC 1.1) was designed as the base controller for a high school Mini-Sumo robot project. The controller is built around the powerful Atmel ATMEGA16 processor with 16kb of memory running at 8 MHz for an 8 mip processing speed (contrast this with a 20 MHz PIC which has a 3-4 mip equivalent speed or an 8mhz HC11 with about 1/2 mip equivalent speed). A 16 MHz crystal is included to allow doubling of the CPU speed. Pin compatible upgrades are available that double the memory.This board can be programmed with a variety of free or comercial tools such as GNU C compiler, BASCOM basic compiler, Atmel Assembler/simulator, CodeVision C, Imagecraft C.
AVR Robot Controller: [Via] - [Link]