Arduino open source single board computer boards arduino a000008 the arduino y250n is a microcontroller board that combines the ease of use of arduino with the power of linux it is based around an atmel atmega32u4 microcontroller and the atheros ar9331 which supports a linux distribution called linino the board features built in ethernet and wi fi support as well as a usb port microsd card slot 20x digital io pins a crystal oscillator a micro usb connection icsp header and 3x rese