Solder fume extractor using activated carbon charcoal media

prusaprinters

I couldn't find a fume extractor that used activated carbon media (that I already had a 5 lb bag of), so I designed my own. Buying this media in bulk is a lot less expensive than buying carbon filters.I went a bit crazy and it is powered by an 18650 battery, has built-in charging circuit with USB-C port, voltage meter, and ¼" tripod mount. The filter media bin is designed to be removable without disturbing the electronics. There is also a cover that goes over the top when not in use, in an attempt to prolong the life of the filter media. STEP file is included so you can easily edit this model in your own CAD software without resorting to hack STLs.Updated: Smaller filter bin that more easily moves air through the charcoal with an average powered fan.Components needed:Activated carbon media (affiliate link)90 mm fanTP4056 battery charging board (affiliate link)MT3608 boost converter (affiliate link)18650 batterySwitchVoltage meter (optional)M3 Screws: Small filter bin (recommended): Four 16mmLarge filter bin (optional): Four 30mmM3 heatset inserts¼" nut for the bottom tripod mount (optional)Assembly:Print all the parts except the cover and stand (both optional). I used ABS.Install the heatset inserts in the fan shroud.Make sure your fan fits inside the fan shroud and route it's wires through the bottom.Wire and install all the electronics in the bottom compartment. Make sure your boost converter is adjusted to the voltage needed to run the fan and that the fan is orientated/wired to suck air into to the fume extractor.Insert a charged 18650 battery and test the electronics.Slide the fan shroud onto the base.Fill the filter bin to the top with activated carbon media and slide on the top cover.Slide the filter bin onto the base.Screw the filter bin into the fan shroud.Install ¼" nut on the bottom of the base (if needed)Optionally, you can print the included stand and/or the cover. The cover isn't airtight, but it's tight enough to hopefully help reduce exposure of the media to the air when not in use.