In this project we will have a look at peristaltic pumps and find out whether it makes sense to DIY our own version of it or whether we should just stick with the commercial buy option instead. Along the way we will create a stepper motor driver circuit and a suitable 3D print for our DIY version.

Step 1: Watch the Video!

The video gives you all the information you need to create your own peristaltic pump. During the next steps I will present you some additional information.

Step 2: Order the Components!

Here you can find a parts list with example seller (affiliate links):

Ebay:

1x Arduino Nano: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x NEMA17 Stepper Motor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x DRV8825 Stepper Motor Driver: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x 10kΩ Potentiometer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x 100µF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Aliexpress:

1x Arduino Nano: https://s.click.aliexpress.com/e/_dULoNXh

1x NEMA17 Stepper Motor: https://s.click.aliexpress.com/e/_dXs7VYF

1x DRV8825 Stepper Motor Driver: https://s.click.aliexpress.com/e/_dShHOO3

1x 10kΩ Potentiometer: https://s.click.aliexpress.com/e/_dX83GAF

1x 100µF Capacitor: https://s.click.aliexpress.com/e/_d7dOwRz

Amazon.de:

1x Arduino Nano: http://amzn.to/2HrK4kY

1x NEMA17 Stepper Motor: http://amzn.to/2odkI1m

1x DRV8825 Stepper Motor Driver: http://amzn.to/2Hsa3sE

1x 10kΩ Potentiometer: http://amzn.to/2oiVsXV

1x 100µF Capacitor: http://amzn.to/2FbDNcx

Step 3: Build the Circuit!

Here you can find the schematic and code for the circuit. Feel free to use them as a reference.

PeristalticPump.ino
Download

Step 4: 3D Print the Pump!

As mentioned in the video, my design is basically a modification of an already existing design from Ralf. It is this one: https://www.thingiverse.com/thing:254956

Here you can download my 5 modified .stl files in order to 3D print them. Make sure to use ABS and an infill of 60%.