It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of oscillator, ...
Got a PIC32 microcontroller and a healthy curiousity about the Rust programming language and its low-level capabilities, but unsure how to squash the two of them together with a minimum of hassle? If ...