This repository has my amateur attempts at playing with Arduinos and their kin. All were developed with Makefile-based build-and-flash in mind:
blink: This is the most basic blink example.morse: Blink an arbitrary message in morse code.morse_noarduino: Same as morse, but use bit-banging instead of Arduino headers or libraries. This results in a substantially lower ROM footprint. This project has its own Makefile to invokeavr-gcc,avrdude, and friends. Only tested on an Adafruit Trinket (ATtiny85).range: Bit-banging approach to using a HC-SR04 ultrasonic range-finder.