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U.V Crystal Ball

last photo ←

Make an easy and cheap crystal ball.
You need:

Instant warm compress (hot ice Experiment)
empty bulb
u.v LED
button cells
or
usb cable

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Step 1Empty bulb

take an empty bulb or what you want for making a round shape.
Light bulb it,s great mold.

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33 comments

Dec 22, 2009. 10:22 PMTJSwaggerson says:

where can i get UV LED's?

Jul 7, 2010. 6:56 PMwoodstockbirdy says:

I have an old hand krank flashlight that has one or u can get one of these pens that a an ink that when sholn with the UV light u can see it. hope this helped ( please cheak out my instructable and rate!!!) woodstockdirdy

Sep 14, 2009. 11:08 AMThe_Guardians says:

also do you think you could hook up a button to turn on the light inside?

Sep 14, 2009. 11:01 AMThe_Guardians says:

is it one of those icy hot pads?

Oct 25, 2008. 10:58 PMzimmemic25 says:

do u mean these hotpads with a metal piece in it which u can boil to make them liquid again?

Jun 3, 2009. 7:43 AM

garrett10 says:

Those hand warmer thingies

Aug 7, 2009. 1:32 AMzimmemic25 says:

Jul 20, 2009. 6:09 PMi am peter says:

could you break the glass around the crystal? i think that would make it cooler

Nov 10, 2008. 2:25 AMXelloss says:

What is the exact component of "hotpad" or "instant warm compress"? Magnesium sulfate (Mg2SO4) or sodium acetate (NaAc) ? I think it better to get the raw material from the chemistry lab of my school...

Oct 1, 2008. 7:39 AMBobS says:

You should try to mix in some fluorescent dye; from a highlighter or a spent 'light stick'. the fast crystallization might even allow several dyes in a swirl pattern within the bulb.....

Mar 7, 2008. 5:34 PMarnoldt says:

Where can you find Instant warm compress

Aug 16, 2008. 4:45 PMGakki says:

Any medical supply store, or the first aid section of a local grocer.

Mar 20, 2008. 9:19 AMdomiking18 says:

I tried it with 3 UV LEDs, but it doesn't work like the bulb in the Video

Aug 16, 2008. 4:45 PMGakki says:

THe bulb in the video is a UV bulb. Which, would not be normaly visable light, but the camera "sees" in a ifferent spectrum than we do. So, on a recording we can see it.

Aug 16, 2008. 4:40 PMGakki says:

Be a neat way to mess with a buddy while he's on the Wii.

Aug 7, 2008. 10:00 AMPumpkin$ says:

It only shows up on camera right?

Jul 19, 2008. 3:40 PM

Plasmana says:

Wow! That is an amazing project! I really like it. 5 star rating!

Apr 23, 2008. 8:35 AMfan45 says:

can anyone talk to me '

Jun 11, 2008. 9:33 AMDerin says:

Apr 27, 2008. 8:31 AM-Aj- says:

instant warm compress is sodium acetate i believe. its also the same stuff as in those instant hot packs for sporting injuries. you can get it from a chemists. yes it does stay solid. its not actual ice when hardened it is a compound that is similar to sodium chloride (table salt) but in a big solid block. so it will dissolve if it gets wet. LED's come in lots of different types with different power outputs. so the uv led's shown here are most probably high intensity ones which are several times brighter than a standard one. usually cost around $5 ish each. i havent seen high intensity uv ones before but i would assume they exist. just ask in places that sell electrical components or on ebay

Apr 23, 2008. 8:34 AMfan45 says:

it is so pretty.so what