I think the first thing people challenge themselves with when they get interested in electronics is the so-called "LED blink." This is the basic of electronics, making an LED flash, and it's the first ...
Optiboot (an older version) is installed by default on the Arduino Uno and (as of 2018) official Arduino Nano boards. It can be installed on all older mega8, 168 or 328 based Arduinos. As of 2019, ...