The board itself also has some differences from the original Arduino Uno. First of all ... also means no USB programming), a different pin layout (Arduino shields likely won’t fit) and more ...

Then, an Arduino board might be exactly what you're looking for. This open-source hardware platform comes in a multitude of versions, from the classic Uno to the tiny Nano to the powerful Giga ...

This feature isn’t exclusive to the Leonoardo, as [Michael] explains in a build he sent in – the lowly Arduino Uno can also serve ... to have your old Arduino board gain some of the features ...