The fume extractor uses a 9v battery to power small 12v fan i purchased from Radioshack and contains only two soldered connections, and so it is an excellent project for anyone who is just learning to solder. Instead of containing an on/off switch, i built the extractor so that the battery is plugged into its body in order to turn it on while also acting as a stand for the extractor itself.
How does it work? The small fan sucks air containing fumes through it, and then blows them through a carbon filter that is glued in place in front of it. This effectively removes all dangerous chemicals that the fumes contain from the air around you as you solder, thus saving you from a headache as you work.
Step 1: Gathering the Parts and Tools
-9v Battery (any brand)
-Hard plastic 9v battery clip
-Small hinged acrylic case (mine was bought with shark teeth in it, it's 55mm by 44mm by 20mm)
-12VDC Micro Fan (http://www.radioshack.com/product/index.jsp?productId=2102824&filterName=Brand&filterValue=RadioShack#tabsetBasic )
-Weller WSA350F Carbon Filters
-Red and black heat shrink tubing (optional; covers your solder connections)
You will also need the following tools/items:
-Soldering iron and Solder
-Fine point Sharpie
-Sandpaper (i used 80 grit)
-Heat gun (if using heat shrink tubing)