Peristaltic pump

thingiverse

This is a high-tech peristaltic pump used in medical equipment. It's designed to deliver small, precise amounts of liquids when needed. To get it working, you'll need three ball bearings - think skateboard or rollerblade wheels - a stepper motor with a NEMA 17 or 23 rating controlled by an Arduino device, and a silicone rubber tube with a diameter of 10mm. Arduino Code: https://github.com/zmaker/arduino_cookbook/tree/master/332-peristaltica