Most of us are familiar with the Arduino Uno, a starting place for electronics projects since 2010. But what if the Arduino Uno was released in 1980? You’d probably get something like ...

This feature isn’t exclusive to the Leonoardo, as [Michael] explains in a build he sent in – the lowly Arduino Uno can also serve as a USB HID keyboard with just a firmware update.

Can it be done for such little outlay? The iFi Uno headphone amp/DAC is on sale now, and in the United Kingdom it goes for £79 or thereabouts. In the United States it’s an even more appetising ...