The first thing I needed was the Arduino itself. I like the idea of supporting an Italian open source project, so I bought an official Arduino Leonardo. It´s good quality and not too expensive in my opinion. I bought it from here.
For the rest the criteria was: cheap, available and reusable. I selected all the components from Farnell and I have filtered first for electrical characteristics, then for price, and last for availability in stock. Usually the last two come at the same time. Continue reading