Introduction: El-Cheapo Flashlight Hack

Picture of El-Cheapo Flashlight Hack

I really needed a UV flashlight for my radioactive materials because they look 2000000 times more cooler under UV than anything else. My parents went to a party and they gave these cool little flashlights away for party favors. I had the UV LED's so I decided to mod them for less than 5 cents!

Step 1: Materials

Picture of Materials

1 Small screwdriver
1 Pair of scissors or wire snips
1-2 ultraviolet or any color of led you want
1 something to test your UV light on (optional)

Step 2: Unscrewy

Picture of Unscrewy

Grab your screwdriver and open up the case, it should look something like the image below.

Step 3: Remove and Replace

Picture of Remove and Replace

Remove the Ultra bright led and shape the UV led the same way as the Ultra Bright one, make sure you know which end is positive and which end is negative!!!! Install your UV LED the same way your UB LED was.

Step 4: Reassemble

Picture of Reassemble

I try and and reassemble my flashlight by sandwiching the 2 halves hot dog wise because that push button falls out easy and so does the actual switch so try and do this swiftly. Once their sandwiched, screw in all of your screws and test it out. You should test it as soon as your 2 halves are together but I felt lucky so I screwed in all the screws and then tried it.

Step 5: Finished!!!!!

Picture of Finished!!!!!

You can now enjoy the full benefits of a UV flashlight (or torch as some of you call it) and freak out your friends claiming that your uranium glass are kryptonite crystals!


marshman19 (author)2009-05-20

uranium glass? what's that?

conrad2468 (author)marshman192009-05-20

Back-n-the-day they used to add (or dope) uranium to the glass to make a greenish color. It wasn't until recently that they realized radiation was bad for you so they stopped putting it into food ware. If your an antique collector who is afraid of cancer you should bring a Geiger counter to the shop and stay away from the "hot" stuff.

do you keep it in a lead container? i dont want a feller 'ibler dying

bbear4 (author)fallenspirit1232011-09-09

Celestial solar radiation beats out terrestrial decomposing elements like a trillion-billion-million to one on how much radiation you're exposed to in your lifetime. It's like a brine fish ordering it's french fries without salt to cut back on his sodium.

Cancer is completely random....i may get it and i may could be from "background" radiation or it could be from those glass things.....but i keep them in a cardboard box in a drawer somewhere...

well yeah good point

beehard44 (author)conrad24682010-04-08

lol microwave on  a plate! put your food on the plate and the plate will cook it!
cooking time may vary from 1 hour-

actually, I'm pretty sure that the radiation in uranium glass is too small to hurt anyone (generally). They stopped using it in food ware because uranium wasn't available during the Cold War.

maruawe (author)2009-04-06

when I changed the light on my light like this ,I used a piece of tape t hold the switch button on until I reassembled the light. I needed a strong led also for another project that I was working on .. haven't tried to use a UV light in the old one But radio shack is on my way home from work .... neat Idea

Numb-Nuts (author)maruawe2009-04-07

What is that that is glowing in such an awesome way?

conrad2468 (author)Numb-Nuts2009-04-07


Derin (author)conrad24682009-05-22

You could build a small................ I should shut up right now.The Radioactive Boyscout may be replicated by somebody.

conrad2468 (author)Derin2009-05-22

Ive read the book! I also extracted some americium from a smoke would need a S*** load to build your neutron gun? I forgot its been so long ago.

Rotten194 (author)conrad24682009-07-27

Dang, I SOOOOOOO want a copy, but my mom would go nuts.

conrad2468 (author)Rotten1942009-07-28

Ha ha ha I'd be glad to send u my extra copy but I can't seem to find it.

bbear4 (author)conrad24682011-09-09

I read about it in readers digest. my parents got me that subscription

maruawe (author)Rotten1942009-07-28

what she don't know won't hurt her ,But when she finds out , I'm glad it's you and not me........ MOM WAS A HOLY TERROR WHEN MAD.

chickenlinux (author)conrad24682009-07-27

naw, just get some americium (a few microcuries is actually probably plenty), and stick a relatively thin beryllium panel over it. It'll cause lots of secondary radiation, which is, in fact, neutron radiation :3 (for informational purposes only)

beehard44 (author)chickenlinux2010-04-08

just buy it off ebay or amazon
some sell without hazmat fees

Sparkington (author)Numb-Nuts2009-04-08

I think the crystal is fluorite, that reacts to uv light.

conrad2468 (author)Sparkington2009-04-08

It is doped with uranium........look it up on www.unitednuclear.com Mine are the same but their the leftover glass that is produced after making these or any other product doped with uranium

Derin (author)conrad24682009-05-22

I think a similar method is used to combine nuclear waste with glass so that it will be slightly easier to (SECTOR CONTAINING DATA IS CORRUPTED) the waste.

eight (author)Derin2010-06-10

Micro-encapsulation... I had a client which did that to toxic waste. It actually works, but not sure about radioactivity, though...

zapper067 (author)2011-08-10

uranium is radioactive it is very dangerous!!!

hintss (author)zapper0672011-08-30

and uranium ore isn't

zapper067 (author)hintss2011-08-31


hintss (author)zapper0672011-09-01

uranium ore just looks like rock, is slightly radioactive, and I think it is flourescent. uranium is a metal that is refined by crushing uranium ore and centrifuging it.

dagenius (author)2009-04-12

jeez, Uranium, how come you are still here? That is soooo dangerous

chickenlinux (author)dagenius2009-07-27

Uranium glass, about 10 plates worth, only increases the count on the counter by ~.08 mR/h, generally speaking. Mind you, the plates in question are thin and contain little uranium, sometimes, a VERY doped butter dish will make it go up ~3.5mR/h, and, as long as ya don't walk around with it taped to your head 24/7, you'll be fine. That's really not much radiation. They (legally) sell boxes of uranium ore *guaranteed* to go to over 100mR/h, but that's _only_ beta and gamma radiation. That's what should be worried about, not his uranium glass.

dagenius (author)chickenlinux2009-08-02

late? look at the date on my comment.

hintss (author)dagenius2011-08-30

not as late as this!

conrad2468 (author)dagenius2009-04-12

Low cpm so my chances of getting cancer are REDUCED.....

fallenspirit123 (author)2009-06-12

wasnt that rock, flourite???

I doubt it....unless flourite is radioactive....tested with my Geiger counter from Russia.....

O ok nevermind then because flourite glows under UV also

lemonie (author)fallenspirit1232009-06-15

Very short though, I've not been able to find a LED at the right wavelength (yet) L

conrad2468 (author)lemonie2009-06-15


lemonie (author)conrad24682009-06-15

Go on then, link one. L

conrad2468 (author)lemonie2009-06-15

Well, anything can be found on EBAY...i wasn't meaning anything specific......I thought u hadnt checked there yet...

lemonie (author)conrad24682009-06-16

Specifically - well under 400nm is hard to find. EBay is full of torches and bundles of the usual. L

cptully (author)lemonie2010-02-02

Here you go:

lemonie (author)cptully2010-02-02

I see two products on that page, both are 405nm, not under 400.


junits15 (author)2009-07-12

and you have radioactive materials around your house because......

conrad2468 (author)junits152009-07-12

Serious: I like to collect odd stuff Kidding: Im stocking up on them because my terrorist friend knows how to make a bomb.........

Einarjon (author)2009-05-01

I think you have the + and - mixed up.
The cathode (minus) should be bigger inside the led.

But as long as you make sure to do it the same way as the old LED (right or wrong on both) - it should be fine.

About This Instructable




Bio: I live in a small town where anything can happen! ESPECIALLY IN MY NEIGHBORHOOD!
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