How to Make a Cardboard Solder Fume Extractor




Introduction: How to Make a Cardboard Solder Fume Extractor

About: Maker, Hacker, Creator? All of the above? Driven in large part by the inspiration gained from other YouTube creators, I wanted to contribute my own projects and stories to this wonderful community. To share wi…

I make a solder fume extractor using very basic materials anyone can easily find. All you need is a 12V PC Fan, some recycled fiber cardboard (you can use corrugated cardboard from a box) and a hot glue gun (as well, you can use PVA glue).

Step 1: Cutting the First Square of Cardboard

I begin by tracing the outline of a 120mm DC Fan on a piece of craft cardboard. This particular craft cardboard is around 3mm thick and is made of recycled paper fiber. You can usually find it at a crafts store or perhaps even a stationery or office supply store. I then cut out the trace and verify that it covers the entire fan face.

Step 2: Measuring the Insides of the Squares

I then cut a square that is 4cm wider and taller than the first piece. I use the first square and measure a further cutout in the larger square. With the piece cutout, I start to measure the cutout for the smaller square.

Step 3: Cutting the Square to Match the Fan Opening

This cutout is angled so that they measure the opening of the fan. I verify that it fits over the fan well.

Step 4: Tacking the Side Pieces in Place With Hot Glue

Once both squares are cut, I turn my attention to cutting pieces of
cardboard for the sides. With the side pieces cut, I tack the first two in place using a hot glue gun. The top and bottom squares are then tacked into place.

Step 5: Gluning the Top to the Bottom

I then tack the other two side pieces in place and the structure is complete. I then add more hot glue all around the assembly to strengthen it. I then test fit it and make final adjustments.

Step 6: Gluing the Assembly to the PC Fan

Checking the air flow direction, I then glue the small square to the face of the fan on the side which will be pulling air away.

Step 7: Testing the Extraction Power of the Fan

Once the glue hardened, I connected the fan to a 12V power supply (like a wall wart). I tested the air flow and the extraction power by using my soldering iron to melt or burn some thick flux paste.

Contrary to popular belief, when soldering, you are not creating lead fumes. The fumes that are created are from the flux. Although not toxic, these fumes are an irritant and should be pulled away from you as you solder.

Step 8: Adding Straps of Hook and Loop Fasteners (aka Velcro)

Now, if all you had was an old PC fan and some cardboard, you would be done. The fumes are effectively sucked away from you into the surrounding room. However, I decided to go a bit further and glued two strips of hook & loop fasteners (aka Velcro) to the face of the extractor. I used the hooks part of the fasteners (ie the harder of the two strips)

Step 9: Adding Carbon Filter to the Face of the Assembly

I then cut a piece of activated carbon filter that you can find at the hardware store in the appliance section. This filter is used for range / oven hoods and you can usually buy a larger piece. Also, this type of filter can be found in aquarium filters.

Adding this type of filter also makes sure that the fumes are trapped into the filter and not just blown around your work space. That’s the end of Part 1. In part two, I make a more sophisticated fume extractor made out of pcv with fan speed control and a power connector.

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4 Discussions


4 years ago

i do something similar where i put a 12v fan on my desk and have it run almost silent. it blows the fumes away just fine


4 years ago

So funny. I made a similar thing a few months ago but never got around to making an instructable. I'll take a picture if I get a chance.


Reply 4 years ago

Please share. I'd love to see your take on it!