Parametric Automated Filter Wheel Changer

thingiverse

This Arduino-controlled, open-source automated filter-wheel changer can move to eight different filter positions and is typically used in experiments requiring good optics. Commercial versions cost over $2,500, but you can create this for less than $50 using an open-source 3D printer. The project is part of the Open-Source Optics initiative by Michigan Tech's Open Sustainability Technology Research Group and has been featured in Science magazine. For this DIY filter wheel, designed for standard 50.8mm x 50.8mm filters, you will need a Nema 17 motor, Arduino Uno, Adafruit Motor Shield, optical switch, and M3 screws, among other non-printed parts. The project also includes printed parts such as filterwheel segments, motor hub, motor mount, filter brackets, and an optical switch flag. To assemble, print the required components in black ABS or PLA to minimize reflected light. Attach the filterwheel segments to the motor hub, followed by the final segment. Customization is possible using the provided OpenSCAD file. For electronics details, refer to the Appropedia article on parametric automated filter wheel changers. The project is part of a larger initiative to reduce the cost of scientific equipment using open-source hardware.