The Roboduino is a Freeduino (Arduino software compatible) microcontroller board designed for robotics. It provides 6 PWM outputs with neighboring unregulated power pins, 6 analog pins and 14 digital pins, 3-pin UART header. The Roboduino code is 100% compatible with Arduino software.

The Botanicalls project is about communication between plants and people. Botanicalls allows plants to call for human help. When a plant on the Botanicalls network needs water, it can call a person and ask for exactly what it needs. When people phone the plants, the plants orient callers to their botanical characteristics.

This is an Audio shield for Arduino. It can play up to 22KHz, 12bit uncompressed audio files of any length. It's low cost, available as an easy-to-make kit. It has an onboard DAC, filter and op-amp for high quality output. Audio files are read off of an SD/MMC card, which are available at nearly any store. Volume can be controlled with the onboard thumbwheel potentiometer.

Arduino is an open-source physical computing platform based on a simple microcontroller board, and a development environment for writing software for the board. Here is a project designed by Alexander Weber. He use an arduino board to communicate with the Telit GM862-GPS module, sending SMS and requesting GPS position through AT commands.

Arduino TinyWebServer is a small and extensible HTTP server implementation designed to run in a limited amount of space on an Arduino Duemilanove. It uses the Ethernet Shield for network connectivity (from Sparkfun or from Adafruit), and the Adafruit Data Logging shield for storage purposes.

A "fan cart" is a roughly constant-force device used in introductory physics labs. It consists of a fan (usually a model airplane propeller on a brushed DC motor) mounted on top of a low-friction cart. Students use it to pretend they're learning something about force, acceleration, energy, etc.

The Remote Accelerometer is a tiny device that has a three axis accelerometer and transmit the acceleration values to a remote host.

This project is base on Arduino. It uses an ADXL335 as the acceleration sensors and a RFM12B transceiver board to communicate with each other.

This is an Arduino base Coffee machine. It will tweet “the coffee machine says: I’m making coffee” if you turn on the coffeemachine, and if you switch it off it will tweet “the coffee machine says: someone switched me off”.

This simple project shows you how to build a traffic and crossing lights base on an Arduino board with several LEDs.

This project shows how to build a web connected gas meter with your Arduino. The hardware is base on an arduino board, an Ethernet Shield , a mini CPU fan connected to a temperature sensor to help keep the unit cool. The main sensor on this unit is a photo-reflector, which is a fancy name for an infrared LED and an infrared sensor in one assembly.