Step 1: Gather Materials
- a 12v pc fan
- a cup or any housing that fits your fan
- active carbon filter
- a switch
- a power source (I used a 12v wall adaptor + the matching input jack)
- a soldering iron
- hot glue
- a potentiometer (I had a circuit lying around that came with my pc case)
- spray paint
Step 2: Fit the Parts
Cut the wires you don't need: we only need black (ground) and red (12v). Blue and yellow are tachometer signal for the pc mainboard and pwm, I believe.
Cut the carbon filter sheet so it fits snugly in your case.
I also had to trim the circuit board of my potentiometer circuit using a dremel to fit into my cup.
Step 3: Assemble
Glue the circuit, switch and jack in place using hot glue.
Put the layers of carbon filter in place.
Put the fan in place and attach the rubber band around the rim of your cup.
Make a test run.
If everything works as expected, you can paint it.
Hope you like it!