pcDuino is a mini PC platform that runs full-featured operating systems such as Ubuntu and Android ICS. It has a built-in HDMI audio/video output interface. It is specially targeted for the fast-growing demands of the open-source community: a platform that can run a full-blown PC OS with an easy-to-use toolchain and is compatible with the popular Arduino ecosystem such as Arduino Shields (with a bridge shield) and open-source projects, etc.
An API has been developed for the pcDuino that gives you access to all of the functions that you would expect using simple Arduino-style language.
It comes with Ubuntu already installed, and is powered by 5V via a micro-USB port. All you need to do is to plug in a USB keyboard and USB mouse, then connect an HDMI monitor/receiver, and finally connect a 5V @ 2A DC input (note that the power connector is micro-USB).
There are two micro-USB ports on the device; power should be applied to the one between the HDMI and Ethernet ports. The other is a USB-OTG port which can be used to plug the pcDuino into a PC or as a normal USB port. The two USB Host ports on the top side are for connecting a mouse and keyboard (or a USB WiFi Dongle and a hub for your mouse and keyboard).
By default, there are two user accounts created: root and ubuntu. There is no password set for root by default. The default password for ubuntu is "ubuntu".
When booting, there is no interstitial information provided to the primary display; the GUI simply shows up after about 15 seconds. By default, the screensaver blanks the screen about one second later. To change this, open the .xscreensaver file in the ubuntu user home directory and change mode from "blank" to "off". This will disable the screensaver entirely.