This repository contains the design files, source code, and build guide for a low-cost CNC engraving machine developed with Arduino microcontrollers and a digital PID controller. The project was ...

min_dist_to_tgt = constrain(min_dist_to_tgt, 1, 10); // in case students do anything crazy! if (error == 0) { // this means there is a 0x3F - if it is there, assume ...

Before I start talking about this really cool thing called Arduino (Italian for "good friend"), let me say a few things about the fascinating subject of physical computing. Physical computing has been ...