Dual 80mm Solder Fume Extractor
Description
I had a pair of 5V 80mm fans lying around and decided to use them for a fume extractor. # Note This prints fine as-is, although the optional backplate needs some tweaking to hold it in place. I'm working on that while keeping the rest of the parts the same. # Features - Accepts standard 130x130x10mm carbon filters. - The left side panel accepts a 15x20mm standard SPST switch and USB Type B port. - Uses two 5V 80mm x 25mm fans. Can be easily adjusted to use 12V fans by replacing the USB plug for a barrel plug. - Snaps together for easy gluing. - The back plate slides in place but doesn't have to be glued for easy fan replacement. - The edges for inserting the carbon filter are chamfered and there is an inverted arch at the top of the front grill to allow easy removal of the filter. # Parts - 2x 80mm x 25mm 5V fans - 8x 30mm M4 pan head bolts - 2x 6mm (or larger) M4 pan head bolts - 2x 6mm diameter* M4 washers - 10x M4 hex nuts - 1x 15mm x 20mm SPST switch - 1x USB Type B connector [like this one](https://www.digikey.com/product-detail/en/cui-devices/UJ2-BV-1-TH/102-4000-ND/6187915) - Wires and solder Note: The 6mm diameter M4 washers are important for the screw terminals. 8mm is more common. # Built in Screw Terminals There are two screw terminals built in, one for positive leads, one for negative. This is to allow you to easily remove a dead fan. They are not absolutely necessary. The screw terminals rely on the printed plastic to act as an electrical insulator. Printing this with electrically conductive plastic (metal doped) is NOT advisable. **If you use the screw terminals, test the resistance of your printed plastic!**
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