Introduction Seeeduino ADK Main Board is an Android Open Accessory Development Kit(ADK). Compared to the Google's ADK Reference design, Seeeduino ADK has many added features like support of both 5V and 3.3V I/O (logic with a switch), smaller form-factor, better placement of reset button, pads for more pin-headers and sparkling RED PCB with Golden finish. Using ADK Main Board build your own Mobile