2014 latest! Arduino UNO R3 development board improved version. Digital I - O digital input - output terminals of 0 to 13, Analog I - O Analog inputs / outputs of 0 to 5, Support ISP download function, Input voltage: No external power supply when connected to the computer USB, external power supply 5V ~ 9V DC voltage input, Output voltage: 5V DC voltage output and 3.3V DC voltage output, Using Atmel Atmega328 microprocessor controller Arduino is an open source code based on the Simple i / o platform, and with the use of a similar Java, C language Processing / Wiring development environment that is easy to understand features. So that you can quickly use the Arduino to make things interesting. Arduino can use with a number of electronic components such as: LED lamp, buzzer, keypad, light-sensitive resistors and the like. Arduino development environment interface is based on open source principles, which could allow you to download free of charge to develop more amazing interactive work. Open circuit diagram of the original design, develop software interface free download, also follow their own needs to be modified, download the program is simple and convenient. Simply use the sensors connected to a wide range of electronic components (such as: LED lamp, buzzer, keypad, light-sensitive resistors, etc.), make a variety of interesting works. High-speed micro-processing controller (ATMEGA328), user interface and development environment is very simple, easy to understand, very suitable for beginners to learn.