I threw together a rocket motor test stand using a spare arduino uno I found in my bin, as well as a load cell and SD card shield. I think I probably spent about $20 total on this project and it looks like it’s going to be really awesome. The load cell maxes out at 20kg, so it should be safe for motors up to size F, which is the maximum that I plan to test at this point. It also has removable inserts so that it is compatible with motors of size 1/2″, 3/4″, and 1.0″ ID (1.25″) OD tubes.
