Arduino UNO The Arduino Uno is a microcontroller board based on the ATmega328. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U programmed https://elecena.pl/product/16454644/arduino-uno-a000066-board-r3 2020-04-14 https://elecena.pl/product/16454644/arduino-uno-a000066-board-r3 2020-09-01 https://elecena.pl/product/16454644/arduino-uno-a000066-board-r3 2021-03-02 https://elecena.pl/product/16454644/arduino-uno-a000066-board-r3 2025-07-09