Some years ago, boredom struck the night before an exam (cue gif: “I know this one, this is classic”). I decided to flash the Arduino blink sketch, but without the Arduino IDE, or even Arduino functions. Just raw C. What started as a dumb idea spiraled into a decent rabbit hole, which somehow became a flash talk I gave at a few places. Eventually bundled it all into a repo during Kochi FOSS meetup.
Dive in: Blinking LEDs