rPi 3 Simple Screwless Case
thingiverse
I wanted a minimalist raspberry pi enclosure with a convenient fan mount for 30 or 40mm fans. I ended up with a nearly tool-free design that conceals most components except the power adapter and one USB port. Both of my Pis have been successfully transplanted into these enclosures. Simply drop the Pi in place, attach the fan bracket on top, and close the lid. That's it. The fan gets screwed to the fan frame.
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