When you purchase an authentic Arduino kit, though — these boards have a tiny gold component located next to the USB input on the UNO R3 board — you are supporting Arduino’s research and ...

It includes the Arduino Uno R3, a balanced and affordable solution perfect for beginners. The Uno R3 is a reliable and versatile board that has become a staple in the Arduino community.

Rather handily, this unit is compatible with 3.3V Shield, fully conforming to the Arduino R3 Layout. To add on to this board you'll have Atmel's Embedded Debugger, EDBG, ...

A 32-bit extension of the platform established by Arduino UNO, the Zero board (Figure 1 below) is powered by Atmel's SAMD21 MCU, which features a 32-bit ARM Cortex M0+ core. ... comes with 256kb of ...