Then, chances are you already know what an Arduino is ... In fact, the original Uno has already been retired. That said, we'll be focusing on the Uno R3 in this discussion instead.

Software scalability is also supported on the new board, allowing easy upgrades for projects made with UNO R3 or Leonardo. Requests from the Arduino community see the USB port upgraded to USB-C ...

shield compatibility and 5V power supply of the UNO R3. The UNO R4 with its 96 red LED matrix on board. (Source: Arduino) In the launch briefing, Arduino emphasized that the UNO R3 has already sold 10 ...