Fume extractor with standard 12cm PC fan and 2 air filters.
The extractor can be powered either from a 18650 battery or directly from USB.
No screws needed for assembly; only some basic soldering skills are required.
List of material:
- 2 x activated carbon air filters 12.2x12.2x10 cm (I cut out some cheap 13x13 cm filters)
- 12x12x2.5 cm PC fan
- 18650 battery
- 18650 battery holder
- TP4056 USB battery manager with short circuit protection
- MT3608 DC-DC step-up converter set to 13 V
- pin header connector for the FAN
- ON/OFF switch
Amazon Basic PLA-PET-G
The battery is connected to the B+ and B- pin of the TP4056 battery manager.
The mechanical switch is connected between the protected output of the TP4056 (OUT+) and the DCDC input (VIN+). The DCDC ground (VIN-) is connected to the TP4056 ground (OUT-).
The DCDC is has to be regulated to 13 V before plugging in the FAN.
The FAN supply is then connected directly to the DCDC output.
Note: verify the FAN connector's pinout before connecting to the DC-DC output; I used an Arctic P12 pwm with standard Intel FAN pinout:
- 1: GND
- 2: +12 VDC
- 3: Sense (not used in this project)
- 4: control (not used in this project)
All the parts can be attached to the 3D printed support with double adhesive tape.