Hello Everybody! Welcome to my second Instructable.

In this Instructable, I'll be showing you to build a fume extractor. It's a really handy tool for soldering. It is really easy to build and you would require some parts and tools and an afternoon to complete this project. Comment, favorite and follow me if you like this Instructable.

So, Lets Begin!

Step 1: Gathering the Parts

You'll need the following parts to build the Fume Extractor :

Dc Jack

SPST Switches X2

Resistors 1K (check the color code) X3

LED X3 ( I used Red yellow and green(

Diode 1N4007 X3

SPDT Relays X2 (DPDT will also work)

9v Battery X2

9v Battery Connector X2

L7812 Voltage Regulator

Heatsink

Silicon Paste (for heatsink)

Connecting Wire

Dc Fan 12v

Empty cardboard box

Screws and nuts

12-24v dc adaptor

Heatshrink / Electric Tape

Apart from this you'll also need the following tools:

Solder Iron

Solder Wire

Glue Gun

Screw Driver

Wire Stripper

Step 2: the Schematic

Carefully follow the schematic and Solder the components. I just simply connected them with wires, but you can also use a perfboard. This Fume Extractor can function when connected via a adaptor or on the inbuilt 9v batteries. The 9v batteries will be connected in series (their output will be regulated by the L7812 IC ) .

Step 3: Assembling the Parts

Assemble everything in the cardboard box. drill holes for the fan and switches and mount hem neatly. decorate everything up if you want to. You can also put some wire mesh in front of the fan to avoid any objects from accidentally going inside the fan. Secure the batteries , fan and wires inside the box neatly and use your glue gun if required. Using heatshrink or Electric tape cover all bare connections to prevent any short circuit.

Step 4: Testing and Enclosing

Connect the adaptor to the dc jack and turn on the switch . If the fan doesn't turn on , check all the wiring once again. then test it again with the batteries. Don't turn on both the switches for the adaptor and battery at the same time as you'll just be wasting power. To avoid this you may use a DPDT switch. If everything is running fine then enclose the circuit and the fan in the box.

Step 5: Decorating Your Fume Extractor (optional)

Now that you have successfully made the fume extractor, you can decorate it to look more pleasing.

I covered it using some sort of handmade paper and put black electric tape on the edge as the border. I added two labels on the front and back side .

Now you can use the fume extractor while soldering. You may keep it near an open window an let the fumes escape. If not, always remember to solder in a well ventilated area as this fume extractor just sucks in the harmful fumes so that you don't directly breathe them but doesn't abolish the harmful affect of solder fumes.

Thank you!