UNO is a Simple i/o platform based on open source code, and it has the characteristics of easy to understand using Processing/Wiring development environment similar to Java and C language. Let you quickly use uno to make interesting things. Uno can be used with some electronic components such as LED lights, buzzers, keys, photoresistors and so on. The uno development environment interface is based on the open source principle, allowing you to download, use and develop more amazing interactive works for free. Open the circuit diagram of the original design, develop software interface for free download, but also according to the needs of their own modification, download procedures are simple and convenient. It can simply use sensors and various electronic components to connect (e.g. LED lights, buzzers, keys, photoresistors, etc.) to make a variety of interesting works. Using high-speed microprocessor controller (ATMEGA328), the development of operation interface and environment is very simple and easy to understand, which is very suitable for beginners to learn.