Easy Fume Extractor




About: iam a B.E Electronics and Communication Engineer. I have great interest on electronics.I love my college life.Even though there are many sadness in my life.I find joy in making instructables.

This fume Extractor absorbs smoke from Soldering iron during Soldering.Soldering iron contains Lead and Tin.During soldering there is a chance of breathing smoke from soldering Lead.Breathing these smoke will cause health problems.Inhalation of tin oxide may cause pneumonia.All solder fumes can cause occupational asthma and other health problems (leaded and lead-free) if used for long periods at a time.This fume Extractor will safe guard you from smoke.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Materials Required

  • SMPS Box
  • Cooling Fan
  • IC 7812
  • 12-0-12 volt Transformer
  • General purpose PCB
  • IN4007 Diodes--------------2
  • Heat Sink
  • 1000uf , 50V Capacitor

I had taken my repaired SMPS Box which was not working.

Step 2: Schematic Diagram

The schematic diagram uses 12-0-12 volt transformer,Full wave Rectifier,IC7812 12 volt regulator,Cooling Fan

Step 3: Operation of Schematic Diagram

Transformer converts 230 Volt AC to 12Volt AC.Full wave rectifier uses two IN4007 Diodes which converts 12 volt AC signal into 12 volt DC Signal.The Output of Full Wave rectifier contains ripples.To eliminate ripples 1000uf capacitor is used to eliminate ripples.We get pulsating DC which is not a pure straight line DC.To convert it to pure DC 12 volt Regulator 7812 is used.Finally the 12volt pure DC is given to Cooling fan for rotation to extract fumes.

Step 4: Soldering the Schematic

I had soldered the components according to schematic diagram in a general purpose PCB.

Step 5: Assembling Fume Extractor

I had assembled the components in an SMPS BOX.

Step 6: Video

Brave the Elements 2016

Participated in the
Brave the Elements 2016

Epilog Contest 8

Participated in the
Epilog Contest 8



  • Indoor Lighting Contest

    Indoor Lighting Contest
  • Make It Fly Challenge

    Make It Fly Challenge
  • Growing Beyond Earth Maker Contest

    Growing Beyond Earth Maker Contest

4 Discussions


2 years ago

Think about build in an active carbon filter, without you will just distribute the soldering fume into the whole room...

You can find those filters on ebay for a few $ or € just look for active carbon filter for soldering.


2 years ago

Interesting reuse of materials, makes me think why not bring out the 12 v.d.c. power to some connectors also, for powering projects too. ☺

1 reply

Reply 2 years ago

you cannot connect 12 v.d.c.Because without connecting the cooling fan if you check the voltage using multimeter it will be exactly 12 v.d.c.After connecting the cooling fan if you check the voltage there will be some drop in voltage and current.So it can't be 12 v.d.c after connecting the cooling fan.If you connect any other project along with cooling fan parallel the cooling fan speed will drop.If the cooling fan speed drops the fume extractor will not effectively absorb the fume.


2 years ago

nice work but you need filter for fume