Heavy Duty Battery Powered USB-C Solder Fume Extractor

Original description 2025-03-07

Mainly, see lewosh's description.

Changes:

• The charger board is replaced with this one. Note that it only balances two of the three batteries, so you might want to get a secondary 2S BMS. Also, note that the circuit diagram provided by the seller contains a short-circuit---you should not connect the midpoint between the first and second battery to the longer side of the board. You should, however, put a jumper there as well as removing the resistor next to it. The correct diagram is this:

• The Bottom has been modified to take this kind of 16850 battery holders. The Base Bottom is made for the 1S holders---because that is what I had at home. :) You have to make modifications if you are going to use the 3S one.
• The spacer is supposed to go on the potentiometer behind the front plate.
• I found that organic supports work much better than the custom supports in the original model, so I removed them.

The charger board is fastened using two M2x6 hex socket head screws.

The motor speed controller is fastened using four M3x6 screws.

Happy printing and building!

Update 2025-03-23 (charging-led)

The charger board has two led:s. One is red and is on when there's USB power. The other is blue and is on during charging and off when fully charged (and flashing when there is something wrong with the batteries). I've used a 1mm I.D. fiber optic cable to lead the light from the blue led on the circuit board to the back of the case. This requires the following components:

• base-v2.stl has a holder and hole for one end of the cable
• In a multimaterial print, transparent (natural) PLA can be used to print led-window.stl in place. For non-multimaterial, led-window-tol0.1.stl can be glued in place afterwards.
• light-conductor-holder-Holder.stl holds the other end of the cable and is held in place by the same screws that hold the charger circuit board. If you need more space for the screws, you could try light-conductor-holder-Holder-largescrew.stl, but that holder is not as strong as the other one.

The light isn't attenuated much by the cable, so I recommend to cut it to sufficient length such that it is easy to assemble the bottom and the base. It's OK to have the cable going in a loop.

Update 2025-03-27 (just some reformatting)

USB-C charging. Internal 18650-holders. Removed custom supports. Added spacer for potentiometer.