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Old 05-02-2008, 12:07 AM #1
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Default LED's for Throwies

With the challenges that BF is going through, it became evident that the Throwies group buy would be placed far to the back of the priority list. The event that I am going to use them at is rapidly approaching. I decided to see what I could do on my own. This is the result.

If you don't know what I'm taking about, check out this thread:

http://www.laserpointerforums.com/fo...num=1204266689

For what my purpose is, I didn't need assorted colors so I just looked for the best deal I could find. I found a guy on eBay that was/is clearing stuff out. I got the first batch of these LED's from him. After our auction concluded, he increased his minimum bid significantly! He wants about 11 cents apiece now (if you buy 1000). I got them for 6 cents apiece, but I got 1000 of them. There is no way I'm going to use 1000 LED's so I thought maybe some of the members that were in on the throwies GB might want some. I will sell them to you for what I paid (6 cents each), plus $3 for shipping any amount in the US. International postage will higher.

Anyway, they are all blue and directional. They are also very bright. I can attest to the statement that if you look directly into the beam, it is uncomfortable in a dark room. I have also tested them out with one of the batteries that I will provide a link to for you to purchase. It was very bright for 6 days. It is still going 8 days later, but it is no longer throwing the bright beam. It is still a pretty blue, but the beam has dimmed. They are bright enough that we used them as night lights and flashlights last weekend when the power went out here. Here is a link to his current auction so you can read about the LED's:

http://cgi.ebay.com/Jumbo-Blue-LED-U...742.m153.l1262

I found good prices for the rest of the components as well. I am NOT selling these other items. I am just providing you with the links to what you will need to complete your throwies. I am ONLY selling the LED's that I have.

Here is the link for the batteries:
http://cgi.ebay.com/200-CR2032-Lithi...742.m153.l1262
If you pay the "buy it now" price, these will cost you 9 cents apiece. If you get them for less in an active auction, you save even more.

Here is the link to the magnets I am using:
http://www.dealextreme.com/details.dx/sku.10304
If you use these and use the "bulkrate" code, they end up $2.36 for 10 (about 24 cents each) If you can use smaller magnets, you will reduce your cost. However, it you are really going to "throw" them, I wouldn't go much smaller.

OK. For 200 throwies (all blue) you will pay me $15 for the LED's, DX $47.20 for the magnets, and the eBay guy $18 for the batteries (all including shipping). That's a total of $80.20. That works out to just barely over 40 cents apiece! That's better than the Group buy prices we were working on.

Anyway, if you are interested in the LED's, let me know. If you just want some killer blue LED's for another project, I won't be very upset If you don't throw them at a building somewhere

Peace,
dave


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Old 05-02-2008, 12:27 AM #2
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Default Re: LED's for Throwies

A tip for anyone who want to buy (it's tempting but I'm not gonna buy):

As Daguin said, the light is directional.

You can diffuse it by doing mad with sand paper. It works good.

Edit: Or dip them in hot candle wax.
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Old 05-02-2008, 12:31 AM #3
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Default Re: LED's for Throwies

Quote:
Originally Posted by FireMyLaser
A tip for anyone who want to buy (it's tempting but I'm not gonna buy):

As Daguin said, the light is directional.

You can diffuse it by doing mad with sand paper. It works good.

I actually like the blue beams of light sprayed across the surface that these give off. Plus, if there is a perpendicular surface within the beam's range, it throws a spot!

Peace,
dave
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Old 05-02-2008, 12:43 AM #4
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Default Re: LED's for Throwies

I use a countersink to drill a kinda inverse cone into the top of the diode. This kida acts like a diffuser but it difuses it outwards.
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Old 05-02-2008, 12:48 AM #5
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Default Re: LED's for Throwies

Quote:
Originally Posted by daguin
[quote author=FireMyLaser link=1209686873/0#1 date=1209688022]A tip for anyone who want to buy (it's tempting but I'm not gonna buy):

As Daguin said, the light is directional.

You can diffuse it by doing mad with sand paper. It works good.

I actually like the blue beams of light sprayed across the surface that these give off. Plus, if there is a perpendicular surface within the beam's range, it throws a spot!

Peace,
dave[/quote]
Yeah that works good... on white surface. Imagine a thowie with like IDK... 5 LEDs. It will be like a star.
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Old 05-08-2008, 04:34 AM #6
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Default Re: LED's for Throwies

OK. This will be the only bump I give to this. After this any of these left over will be relegated to a drawer in my garage. If you want less or more, it works for me. They are 6 cents apiece plus shipping.

They are 5mm, directional blue (470nm) LED's at 4500 mcd (@ 20ma)

Peace,
dave
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Old 05-08-2008, 05:05 AM #7
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Default Re: LED's for Throwies

Hello Pal, how many have you got left?
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Old 05-08-2008, 05:09 AM #8
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Default Re: LED's for Throwies

Quote:
Originally Posted by scopeguy20
Hello Pal, how many have you got left?

800

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Old 05-08-2008, 05:34 AM #9
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Default Re: LED's for Throwies

Oh man, that is a totally awesome idea.

Unfortunately, I don't have access to me tools, so I can't make the throwies... So no purchases from me.

But... but... I will DEFINITELY do this in the future! I can just imaging going out with a few mates and throwing them all around town square, that would be amazing!
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Old 05-08-2008, 05:44 AM #10
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Default Re: LED's for Throwies

Quote:
Originally Posted by Murudai
Unfortunately, I don't have access to me tools, so I can't make the throwies...
Throwies don't require tools. You take the LED. Straddle the battery with the pins. Tape the pins to the battery by wrapping the tape around them once. Place the magnet over the positive side. Wrap the tape around the whole thing a time or two more and voila! . . . pretty lights for over a week 8-)

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Old 05-08-2008, 06:15 AM #11
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Default Re: LED's for Throwies

Wow, they last a week? I suppose if you throw them high enough, they aren't coming down [smiley=evil.gif]

Well, maybe another time then
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Old 05-08-2008, 06:39 AM #12
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Default Re: LED's for Throwies

Quote:
Originally Posted by Murudai
Wow, they last a week? I suppose if you throw them high enough, they aren't coming down [smiley=evil.gif]
I'm testing one on my desk. It was very bright (I could walk into my office without any other light on) for the first seven days. It is still glowing (although significantly dimmer) now. It has now been two weeks.

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Old 06-10-2008, 08:26 PM #13
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Default Re: LED's for Throwies

Even a very small neo magnet will stick like a leech when in direct contact with iron, so I just wondered if a smaller (cheaper ) magnet might suffice if it were attached to a throwie by a short string--so it would have a lot less effective inertia as it seeks out an attracting magnetic target close to where thrown.
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Old 06-10-2008, 11:20 PM #14
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Default Re: LED's for Throwies

You can count me in for the LED's. Ive been wanting to buy some off Ebay for some time now. I will take a 100, if you have them.

Let me know....and can just pick them up from you.
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Old 06-10-2008, 11:43 PM #15
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Default Re: LED's for Throwies

Quote:
Originally Posted by vizp
Even a very small neo magnet will stick like a leech when in direct contact with iron, so I just wondered if a smaller (cheaper ) magnet might suffice if it were attached to a throwie by a short string--so it would have a lot less effective inertia as it seeks out an attracting magnetic target close to where thrown.

I haven't done much "experimenting" with these. However, with throwies, one does NOT have direct contact between the magnet and the metal surface. When you make a throwie, there is at least the thickness of the diode leg AND a couple of layers of tape between the magnet and the surface. I don't know how much smaller you could go with them and still have them stick to the surface when "thrown" at the surface.




Quote:
Originally Posted by Aaron636r
You can count me in for the LED's. Ive been wanting to buy some off Ebay for some time now. I will take a 100, if you have them.

Let me know....and can just pick them up from you.
They are just sitting in a drawer. Six cents each. Do you live close enough to Upland to make it worth just dropping by (at $4.24 per gallon)?

Peace,
dave
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Old 06-10-2008, 11:47 PM #16
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Default Re: LED's for Throwies

I'm about 12 minutes from Upland. More than welcome to mail them if you prefer. Just let me know the shipping to 92503 and I can...Paypal??

I do a large halloween event every year and use allot of LEDs for lighting.

Thanks Dave
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