Jaroslaw Lupinski designed Senpai (Extra Shield for Arduino Programming Nimble) shield to be easy to program AVR microcontrollers using Arduino.     [via]  

This wireless hidden water gun is a real treat.Schematics and source code can be found at AVRFreaks but you must to be register.This video explain and shows the setup in action. The prankster holds onto a wireless AVR remote, and when the unsuspecting victim walks by, he activates a second AVR controlling a pump; spraying [...]

This project is useful for repairing broken PC monitors. The monitor tester uses ATTiny2313 AVR MCU running at 20MHz speed. Power supply is made using one xx2950 device chosen because its low quiscent current, important factor for battery powered devices. You can use an 78L05 equivalent integrated circuit if you are not interested in consumption [...]

The FabISP is an in-system programmer for AVR microcontrollers, designed for production within a FabLab. With this AVR Programmer you will be able to programm your AVR without removing it from your board. [via] Source: David A. Mellis

Award winner from VingPeaw Competition 2543, the robot built with 2051, L293D, and four IR sensors. Simple circuit and platform, quick tracking and easy-understand program using C language. Microcontrollor AT89C2051 and H-Bridge driver L293D were used  to control direction and speed of motor. Source: Plermjai Inchuay

Tiny Basic Controller (TBC) is a simple device that can operate as a PLC (program logic controller) for home automation, control, etc. For example, this one can dial-up by modem to the remote computer and send the status of the controlled system, can control some processes, temperature regulation, battery charging, can be used for educations [...]

This development board is perfect for all the newbies that want to learn about AVR Microcontrollers or want to build some nice projects with it. ATMEGA8 Development Board contains: ISP programer RS232 comunication (serial port) High Power Voltage control ON/OFF Circuit All pins are marked PC power jack Source: Pop Gheorghe

This is a simple capacitance meter which can measure capacitance value easy. There are some measurement methods for capacitance, at one time the capacitance was measured with a impedance bridge or a dip meter. Recently typical capacitance meters can measure capacitance and some additional characteristics from current vector by applying AC voltage to the Cx. [...]

This is a simple circuit which can detect when you touch a sensor connected to one of the sensor inputs. It can be used to add a touch switch to your computer for example. It uses an AVR micro controller, the AT90S2313. Source: Pontus

Today I would like to present USBtiny programmer with USB interface. The heart of the system is ATtiny2313. Source:elektroda.pl Download:USBtiny programmer

This thermostat with ATTiny25 Atmel microcontroller would only allow the fridge to go up to a maximum of 5 degrees… hardly an ideal beer brewing temperature. Source:aliask