The newly released Arduino Leonardo has a few very interesting features, most notably the ability to act as a USB keyboard and mouse ... to have your old Arduino board gain some of the features ...

USB is not a native feature on all microcontrollers or even Arduino-compatible boards. While some do have it built in like those based on the 32u4 for example, most either don’t have it at all ...

First off, projects centered on electronic components need sufficient input/output pins ... Aside from the USB port, you can ...

It's like a shrunken version of the Arduino Leonardo as it features the same ATmega32U4 microcontroller, micro-USB port ... double as analog input pins on both boards. That's where the ...