DIY Servo-Controlled Peristaltic Pump

When you’re making a project, you’re often presented with the option to make certain components or simply open your wallet. While the DIY version can be a learning experience and interesting in its own right, it can be worth it to just purchase a part that you know works. In this build, YouTuber GreatScott! answers the question of should you DIY or buy a peristaltic pump?

As seen in the video below, these pumps work by progressively squeezing a silicone tube to force water out of one end, and cost around $30 for a quality device. Cheaper and less capable versions are available, but he wanted to see if he could make one for under $30 that gives a flow rate of over 100mL per minute. For the motor, he selected a NEMA 17 stepper because of its standardized faceplate, and adapted a 3D-printable design found on Thingiverse to accommodate it.

The motor/3D-printed structure looks great and works well, but did require electronics for control including a driver board and an Arduino Nano. Final pump cost was less than $30, and produces an excellent flow rate of 200mL per minute. Given how this project turned out, if you have the time and a 3D printer, this device is indeed a good DIY candidate!