Activated Carbon Air Filter

Step 4 Finish it up

The white tube on the top of the filter is there to help spread the filtered air around the room. To make it, all you have to do it tape together a paper tube that will fit over the fan. The top is made by cutting vertical slits in the tube and overlapping them to make the paper fold over the top and deflect the air into the room.

To turn it on, you take the two computer fan leads and solder them to the 12 volt power supply. If everything works, it will be very hard to hear it running.

Lastly, if you want the filter to emit a fragrance into the room, it is very simple. Place your favorite liquid fragrance into a thin medicine bottle and tape it to the center of the fan. As the air from the fan passes the medicine bottle, it will pull the fragrance out of the bottle and into the air.


Now, the only problem with the filter is that the air emitted has a slight smell of carbon and I am not sure how to get rid of this. Since the fan cannot develop a lot of pressure, forcing the air through another filter would be difficult. If you have ideas then feel free to email me.

Comments

[csatchell]

This device is exactly what I am looking for, but one question: How do you attach the 12 volt AC/DC converter to the fan wires?

[Crapxxas19]

cut the wire open and solder the + to the red and _ to the black. If you cant tell which is + and - guess and if the fan doesnt work, switch the wires.

[Hatty]

There is just a positive and negative wire coming out of the fan and I hook that up to the positive and negative output of the power supply. Its as simple at that.

[killprogram]

ah yes but be careful when doing so i would recomend getting all of your connections together and semi-permanently fastened BEFORE even plugging it in and i mean i know it is dc but what if the transformer where to break just then? ill tell you what you would have a positivie and a negative end of AC power going from one hand through your chest and heart, to the other

[Hatty]

12 volts isn't really enough to break the skin and get into the body, so there really isn't much danger. But anytime you work with electricity you need to take precautions.

[Wally_Z]

Well, you won't feel 12V. But if the amperage is high enough, it'll kill you if you let it arc across your heart.

[Crapxxas19]

12v cant arc across your body. The resistance of skin is too much. In any normal case, when working with 12v and under it is impossible to shock yourself unless you soak yourself in water for a few days.

[Wally_Z]

If you actually READ what I wrote you will realize that I said "If the AMPERAGE is high enough, it'll kill you if you let it arc across your heart". Bad read^. AMPERAGE IS THE KEY WORD HERE. Google it if you don't know what that means.

[Crapxxas19]

You need voltage for amperage to kill!!!
I have put my fingers across a 12v 5a source and i didnt feel anything. You need at least 40 volts with moist skin to even feel anything.

[Crapxxas19]

Think of electricity like water. If you put your finger at the end of the faucet no water flows. This is like low voltage (pressure of water is low) and no amperage (there is no water coming out.) If you are using a hose, there is some water leakage because the pressure is higher so it means that amps are flowing. Basically you need some voltage to make amperage effective enough to kill.

[GsE-Lance]

30mA kills a person at 230v,
Ampere = Volts/Resistance, in this case 12v / 1000r (resistance of the skin)
Therefore Wally_Z's arguments are invalid.

[jonnybegood]

Yeah yuo are rigth! V=R*I (V=Voltage in volts , R=resistance in omhs and I is current in amperes),WELL this is the OHM Law,and on the other side any DIELECTRIC have a constant, a point that change from not conductor to a conductor(For example the dialectric constant of the air is about 3 Kilovots(3000 vols)...so taht explain the spectaculr pictures of tesla or the ligting)..

[Crapxxas19]

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!
Some people need to know what they are talking about, SERIOUSLY!!!!

[WERNER SLABBERT]

you might actually try three fans in line. say for argument's sake the first fan gives you one bar of pressure, a second in line would double that to about 2.3 bar of pressure and a third would then daouble that to about 4.6 bar. in theory that is.

[MrHyde]

for more pressure maybe use this http://www.instructables.com/id/Tesla-turbine-from-old-hard-drives-and-minimal-too/

[chamunks]

I'm curious how you would use this turbine to create pressure or apply the turbine to this.  Maybe I'm just browsing instructables too late at night. 

[lemonshark10]

By manually spinning the shaft of a tesla turbine th opposite effect is acheived and pressure is generated

[nckballer]

I also forgot to say attach your fan box to the mailing tube

[nckballer]

For adding another filter instead of using paper to construct a tube just use a 3"x36" Mailing tube you can find it at packaging stores(They are about $5) for this size but get the size you need keep in consideration that I just had the tube laying around, if I were to of bought it, it would be a lot shorter because I just dont need that much! Now back to what I was saying you can attach the tube to your carbon filter box right above the fan(attach it anyway you like glue,tape,whatever)make sure you dont have the tube too big and in the middle of the tube cut it in half this is where you will use some pantyhose and chicken wire to make your carbon filter and at the very take a little cardboard box(or make one) and cut a hole for the fan and mount it on the inside or outside of it and there you go you should now have decent enough pressure to get the air flowing. write me back and tell me what you think!