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Picture of Halloween: Dry Ice Fog Machine
One Halloween, my family used dry ice for fog by dumping boiling water on it. I thought "I have an old PC fan... I wonder if I could use it for a fog machine that doesn't use water!" so I built it. I haven't been able to test it yet, so if anyone builds it, please comment how it turns out!
P.S. This is my first Instructable. Please comment!
 
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Step 1: Gather the Materials

Picture of Gather the Materials
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Here is what you need:

Materials:
Paper towel tube
PC fan
9V battery
9V battery clip/holder
Super Bright Colored LED OR Super Bright White LED and colored plastic film (I didn't have any bright colored LEDs at the time)
Styrofoam cooler
DUCT TAPE YAY!

Tools:
Knife
Scissors
Sharpie
Hot glue gun
Wire

Step 2: Cut the Holes

Picture of Cut the Holes
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The first step is to cut the holes. Place the PC fan in the center of the lid and use the Sharpie to trace it. Then use the knife to cut it out. For the paper towel tube, trace it on the side of the cooler and cut it out. Last, trace the 9V battery next to the fan (not too close) and cut out a hole a little longer than the battery. For all of these holes CUT ALL THE WAY THROUGH.

Step 3: Glue the Fan and Paper Towel Tube into Place

Now, if your fan has a yellow wire, cut it off (you don't need it). Glue the fan into the hole you cut in the last step with a generous amount of hot glue (to seal it), making it flush with the top of the lid. Cut the paper towel tube any length you want (I just made mine as long as the styrofoam is thick) and glue it into place. You may have to use bits of extra styrofoam to close up big cracks.

Step 4: Make the Bottom of the Battery Holder and Thread the Clip

Picture of Make the Bottom of the Battery Holder and Thread the Clip
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Use the DUCT TAPE (VERY IMPORTANT) (you don't have to use white) to make a bottom for the hole you cut for the battery back in Step 2. Make sure it's really strong, then cut a slit at the top for the battery clip and thread it through.
dscorca3 years ago
Has anyone tried this without using water? I'm curious if it can pump out a decent amount of fog without adding hot water.

Typically, I put 5 to 10 pound blocks in a basket and lower it into hot water (at about 130F).
The main problem I have had with using dry ice is that once the water cools down, (which happens pretty quick), it fails to produce the smoke because it melts more slowly. I am going to attempt to construct one using a small inst hot water heater. Sometimes you can find them used for cheap.
Jimmacle (author)  thebigjerryrig4 years ago
Oh yeah, I completely forgot about the water! I think I was planning to assume the air was warm, or to put a coil near the fan to heat the air.
catsnw4 years ago
next year i am gonna make a few of these and put them on the back of my golf cart and drive around!
Jimmacle (author)  catsnw4 years ago
Cool! Make sure to tell me how it turns out!
littlewit4 years ago
You could also just use a colored LED. The cellophane does give it a cool custom tint though.
Jimmacle (author)  littlewit4 years ago
Also, I agree with you about the tint. If you've ever seen the movie Cars, it looks a lot like the Ghost Light!
Jimmacle (author)  littlewit4 years ago
Yes, I would've used a colored LED, but I couldn't find any of my blue ones :P
TSC4 years ago
Hmmm Nice!!
Jimmacle (author)  TSC4 years ago
Thanks!