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OMIS: An Open Millifluidic Inquiry System for small scale chemical synthesis and analysis #opensource @LabOnTheCheap

OMIS is a 3D tool for performing small-scale chemical synthesis and analysis. The system is Arduino-based and consists of an automated syringe pump run by an inexpensive stepper motor and reaction vessels. The design is meant to allow for fabrication “in one day”, and can pump fluids at rates between 60 and 300 μL/min. we learn from Lab on the Cheap.

The project paper has all the build details and instructions. The Bill of Materials lists the cost at around $250, including the PETG filament for 3D printing. There are CAD designs, electronic schematics, and software including step-by-step assembly pictures in the paper!

The project has a website and GitHub listing resources with the assembly instructions.

For the stepper motor, the paper refers to tutorial work by Adafruit on wiring up a stepper motor to an Arduino. This makes some of the most traditionally difficult steps in setting up a project much easier. Part designs can also be found on Thingiverse, where in the comment system you can see problems others have run into or suggested modifications.

See the video below for some example work and the paper for additional details. And see adafruit.com for stepper motor and other parts and the Adafruit Learning System for free tutorials.

Are you interested in fluidics and pneumatics? Let us know in the comments below.


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