Arduino is an open-source electronics platform, based on easy-to-use hardware and software. Arduino boards are able to read inputs: light on a sensor, a finger on a button, or a Twitter message. And turn it into an output: activating a motor, turning on an LED, publishing something online. Thanks to its simple and accessible user experience, Arduino has been used in thousands of different projects and applications. The Arduino software is easy-to-use for beginners, yet flexible enough for advanced users. Arduino is open-source hardware. Therefore, many cheap, Arduino compatible microcontrollers exist.