On the Uno boards, there’s an IC which is responsible as a USB to serial converter and it makes it possible to program the Arduino and also communicate with it from the computer. The problem here is ...

Two new variants of the Arduino Uno development board ... with a 48-MHz Arm Cortex-M4 processor core, the Uno R4 boards deliver up to 16 times the clock speed, memory, and flash storage of the Uno R3.

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 ...

the 16 MHz AVR of the Uno is a lot beefier, which raises the hope that a color version like the ZX Spectrum one is also in the future, even if it may require an add-on board with a framebuffer.

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 ...