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Uploaded by on Apr 18, 2009

I built this in about 10 minutes from scraps around the house. It generates a spark of about 15000V from just water! Kept the kids amused all day.

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Education

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Uploader Comments (BrizzyWiz)

  • Hi

    I want to build this for my Science Fair project. What are the exact materials that I will need? and can I have some basic intrustions? Two paint cans, foil, large water bottle, wire, what kind? Wood post? how does it charge up? where are the two terminals? Thanks I appreciate your help, I thank this is very cool.

  • @gelkrm, I used two food cans (paint can is fine, so long as it is bare metal). To make it you just:

    o cut a coat hanger in two

    o bend one end of each bit into a circle

    o solder the other end to a can (at about 45 degrees)

    o bend the wire so that the circle site parallel to the ground above the other can

    o put foil around the circle (as you see in the video

    o put this on a piece of foam

    o two bits of foil crunced up an placed under each can

    o drink bottle with holes above each circle

  • (part 2)

    it doesn't matter how you suspend the drink bottle, so long as it doesn't touch the cans/wire/foil etc. I used my wifes tapestry stand, as it was about the right hight.

    Now place the cans on the foam with the circles above the other can, put the crunched up foil under each can (like the video) and make the gap about 5mm (about 1/5 of an inch). Poke a hole in the bottle so that it drips through the middle of the circle (too big and it wont drip). Fill with water, and wait. Thats it :)

  • (part 3) - max 500 characters :)

    You can tape a piece of tissue paper to a can. When the charge builds, the paper will move. If it doesn't spark, but the paper moves and stays out, make the spark gap smaller. If the paper keeps going up and down, but you don't get a spark, use an AM radio tuned away from any station. Put it near the cans - you should hear a "spark" from the radio. This will show you where the charge is leaking (ie. cans too close to each other etc).

    Hope this helps.

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All Comments (24)

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  • if the same water is used (recyclced around say) and this is left to run, does it alter the water so that it ceases to have the same effect (eg de-ionises it), anyone know?....

  • when the water stops, does it stop running out of the bottle, or is it suspended or anything like that inside the can, just before it hits the water in the can? it looks like in the video that the water keeps coming from the bottle but slightly less so.

  • great stuff. i love how you did this with real basic material. now i'm going to be thinking for ages, hmmmm what else does this mean and what can be made from it....

  • why does the water stop when it's about to spark. SCIENCE IS SO F UCKING CRAZY

  • Very simple and easy to make- nice demonstration!

  • use it to light a fire

  • @x0xAzhariax0x, it really did only take 10 minutes :) Soldering would be better, however tape should work. The hangers *must* connect to the outside of the can. The inside is charge neutral. Just use duct tape, or packing tape. The foam doesn't really matter if it has holes, so long as it is thick enough to insulate the cans from the ground. When you have everything ready, line up the hole in the bottle to the middle of the foil ring, which is directly over the other can, and in the centre.

  • @x0xAzhariax0x

    And this has to be finished by Tuesday because finals are on Wednesday and Thursday, then I'm going to graduate (high school) on Friday! Because we have had so few grades go in for this marking period, I'm afraid this project could drop my grade considerably right before the end of the year when I can't even make up for it. :(

  • How did you make this in 10 mins! I've spent all day working on mine (it's for my AP physics class and it's due the day after tomorrow - Tuesday) and it still won't work! Mine looks almost exactly like yours. The only differences are, besides how I hung my bottle, that my foam isn't solid (it has holes in it - it's all I have) and I don't have any equipment for soldering, so I just stuck the hangers in the cans. Do these things make a big difference? Any suggestions? PLEASE! I'm so frustrated!

  • I got it - ended up scrapping several models and mimicked yours. What I found important were a few things - ensure that your hoops [aluminum foil worked better than the other efforts] have the water passing through dead center. Thumbtack sized hole in the bottle - no larger. Created a center barrier to avoid any moisture from shorting out on the foam due to splashing water. But the key seemed to have been the bottle - suspending it just above the hoops - far enough not to short. Worked.

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