Carbon Filters (5 pack)
The rest was parts I had laying around. I started with an old 120MM computer case fan that was removed when I bought new quieter fans.
|Dirty 120MM Case Fan|
|Cleaned fan and filter, with filter holder and 3 to 5 pin adapter|
The carbon filter is slightly larger and thicker than standard dust filters. So I have to trim two sides of it to fit. I laid the carbon filter on top and used a razor blade to scour the filter. Then used scissors to finish the job. Make sure you have something underneath while you are handling the carbon filter as it leaves little pieces of filter everywhere.
|Resizing Carbon Filter|
|Fan with filter holder|
The carbon filter is much thicker than the standard dust filter so I wasn't able to just put the top of the holder with the plastic nubs it uses. I didn't have a rubber band that wasn't dry so my fiance used a hair tie to solve the problem, which if you know, comes in handy quite often.
The fan is usually powered from your power supply in your case, which in this instance wouldn't work. I had a power supply from an IDE to USB adapter that would be would be perfect for this. Now that I think about it, I could also use it as a benchtop power supply as it has 2A for each, 5v and 12v. The only thing left is that the fan has the motherboard fan connector instead of the 5 pin molex. Good thing I keep all these adapters when you buy a new computer case! I found a 3pin to 5 pin molex adapter, perfect!
|Parts to power the fume extractor|
At first, during testing, the fan wouldn't power up. Turns out the 2nd ground connection for the 12v rail isn't real, just a rubber hole. I guess they cut corners where they can on cheap power supplies. This turned out to be quite useful. Using a scrapped molex plug, I was able to make a switch by connecting the ground of the fan to the real ground of the power supply.
|Power Supply with dummy ground|
|Soldering molex for power switch|
Here it is in action. It is hard to see the actual fumes being drawn. You can almost see it at the tip of the soldering iron.
|Fumes being drawn in|
Please let me know in the comments if you end up building one, I would love to hear about it.