Most already come complete with the UNO board and a bunch of components like LEDs, a temperature sensor, a DC motor, a servo motor, and an LCD module. Then, there's the matter of the power supply.

This library includes dozens of Arduino sketch examples,” according to its maker, New York-based Teknic. For a more comprehensive programming environment, there is a C++ library which includes example ...

A bare servo wouldn’t be much fun, so [Outaspaceman] connected a tentacle and a small Swiss army knife. Yes, a knife. The tentacle in question is designed to be a finger puppet .