So just like with open source software, people can and do make derivatives of Arduino boards or entirely new products powered by Arduino technology. Why is openness important in hardware?

This zip file contains everything necessary to adapt the Arduino libraries to the target board or chip.

In Sept. 2013, [Squonk42] posted up on the Arduino forums requesting the schematics and editable design files for the Arduino Yun, and he still hasn’t received them or even a response.

Arduino: this hardware/software combo allows you to program chips and test them on the fly—a real advantage of open hardware. One of the wacky creations possible with Arduino, this spider-like robot ...

A significant partnership with the Zephyr Project has highlighted Arduino’s commitment to open-source development. This partnership brings a leading real-time operating system into the Arduino ...

Arduino board programmed with an audio file Programmer Mike Tsao has devised a clever method to program an Arduino board using sound.

NEW YORK - June 23, 2011 - Today BREAKFAST released the Verbalizer, an open- source development board designed to interface with Google's freshly-minted Voice Search for the Desktop. Out of the ...