( Wrote a blog post about this here ) It was raining hard, a week ago. And what could you possibly do on a rainy Saturday afternoon? Well... You can make a Forth interpreter/compiler from scratch... ...then put it inside a 1.5$ Blue Pill microcontroller... ...and finally, inside an Arduino UNO... ... within its tiny 2K RAM! Click on the image to watch it blinking the LED of my Arduino: I haven't d