As I have been doing more electronics projects I felt I needed a filter for the solder fumes. Aster some online research into DIY filters I came up with a prototype using a 80x25mm PC fan and some HAPF60 filter taped together.
This worked well, however it was not easy to position and the fan blades were unprotected and I broke one fan by hitting the blade with the tip of my iron. This lead me to design an improved version using a flexible light base and 3D printed parts instead of tape.
This design is very nice and works well. The flexible base allows me to position the fan right above whatever I am soldering. I have released the files for this on Thingiverse.