Arduino boards may be purchased preassembled, or as do-it-yourself kits; at the same time, the hardware design information is available for those who would like to assemble an Arduino from scratch.” ...

The ATOM X1 is the world’s smallest 32-bit arduino and breadboard compatible microcontroller measuring 14.9×14.9mm and weighing 0.95 grams. 256KB ROM, 32KB RAM, 48MHz clock, arduino zero ...