Allowing an Arduino to become nearly any kind of USB device. A fourth mounting hole has been added to the UNO for more stable mounting. The booloader is now the Optiboot bootloader. The boards can ...

However, while the Uno is a helpful board for your beginner projects ... in size and microcontroller, the Arduino Nano and Micro share some similar pinout configurations. They both have two ...

[Andrew] writes in with his Z80 single-board computer ... he used an Arduino Mega as a debugger, making the SBC an Arduino shield itself. Using such a common header pinout for the Z80 computer ...