Arduino is little open source circuit board that lets you create some fairly compelling projects with a few lines of code and some circuit boards. The ...

When the phone is opened, the virtual keypad shows up on the touch-sensitive 1.6” 260K OLED LCD, allowing users to dial numbers and view contacts with the stroke of a finger.

Meanwhile, pre-provided shield templates allow your smartphone’s display to emulate a switch, slider, keypad, or LCD display without you actually having to wire anything up.