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Developed by the Graffiti Research Lab a division of the Eyebeam R&D OpenLab, LED Throwies are an inexpensive way to add color to any ferromagnetic surface in your neighborhood. A Throwie consists of a lithium battery, a 10mm diffused LED and a rare-earth magnet taped together. Throw it up high and in quantity to impress your friends and city officials.

Click on this link to see the LED Throwies in action in NYC thanks to resitor and fi5e!
 
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Step 1: Materials List

Picture of Materials List
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LED throwies consist of only a few inexpensive parts and can be made for ~$1.00 per Throwie. You can reference the parts list below or download the attached spreadsheet for more info on parts, part's numbers, vendors and application notes.

Part: 10mm Diffused LED
Vendor: HB Electronic Components
Average cost: $0.20 avg per LED
Notes: Cost reductions for larger quantities. Comes in red, blue, amber, white in both diffused and clear. Diffused works better than water clear for the Throwie application. HB has even created a Throwies packs page with deals on 10mm LEDs and lithium batteries!

Part: CR2032 3V Lithium Batteries
Vendor: CheapBatteries.com
Cost: $0.25 per battery
Notes: Cost reductions for larger quantities. With the 2032 Lithium batter, depending on the weather and the LED color, your Throwie should last around 1 -2 weeks.

Part: 1-inch wide Strapping Tape
Vendor: Your local hardware store
Cost: $2.00 for one roll
Notes: One roll will make many throwies

Part: 1/2" Dia x 1/8" Thick NdFeB Disc Magnet, Ni-Cu-Ni plated
Vendor:Amazing Magnets
Cost: $13.00 per 25 magnets
Notes: Cost reductions for larger quantities

Part: Conductive Epoxy
Vendor: Newark In One
Cost: $32.00
Notes: The epoxy is optional.
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I have posted a how-to on making throwies with removable tabs where you can pull it out to turn the LED on and slide it back in to turn it bad off. It's not very hard to implement, and is quite useful for conserving battery power.

Here's the link: http://flickr.com/photos/everythingdigital/sets/72057594069888500/

I'm also working on throwies that automatically turn on upon sticking to something and off when they are removed (as suggested above), and I have a few prototypes working but there are still some bugs to work out.
Q-Branch (author)  everythingdigital9 years ago
I have included your how-to on the G.R.L. Throwies site and in the upgrade section of the throwies instructables post. Thanks so much for the mods and looking forward to the next rev!

Best quote: "Throw it up high and in quantity to impress your friends and city officials."

How long do they last?

not sure city officials would be that impressed.

Kirbsome!5 years ago
INTRODUCING:

Throwies on steroids -
The LED ULTRIE!

7 LEDs arranged in a ring
LED Ultrie.jpg

so simple yet so powerful

I have great news, you are today's winner of the "I Made It" Challenge for the month of june. Thank you so much for being a part of the instructables community and encouraging authors to post more projects!

For winning you are receiving a 3 month pro-membership.

http://www.instructables.com/community/June-is-I-Made-It-Challenge-Month-Win-a-Pro-Mem/
fun with LED throwies
1566068116_e52b4e8699.jpg955773733_f2f32e7f86.jpg1566068136_7291032f74.jpg

it is in the tutorial on how to create an instructable

Ibwise11 days ago

will study this may be what I need to make dollhouse lights

nlewkowitz22 days ago

Cool concept.

HelenR23 days ago

I don't want to be a party-pooper, but those lithium batteries are lethal to children. So you might want to think carefully about where you put these things.
http://www.bbc.co.uk/news/uk-england-manchester-29610570

my4pop127 days ago

Very nice liked. I hope you the further development.

Amazing Led Throwies! I love it!

Thanks to author.

This will be perfect for parties. Will try it soon :)

It's good that LED light can be put everywhere now

curly gurly2 months ago
This is so cool and creative!
Snellingkorey2 months ago

My dog would love this, can you make it dog proof?

I agree with Monthrax, you can't really make this dog proof!

Can anything be truly dog proof? (I suppose you could put it in a small solid plastic box but it depends on the size of your dog.)

Tbus2 months ago

This is so much fun! I'm studying a learn-at-home basic electronics course http://www.ciebookstore.com/basic-electronics-cour...
and this is a great supplement project. I'm going to tell my instructor to check this out and maybe he can include something like this for a future lab. Thanks Q-Branch!

ZombTech2 months ago

Made them, Threw them, had an awesome time :)

how long will the batteries last?

davidbarcomb4 months ago

Very nice project and well explained tutorial. Thanks

StumpChunkman4 months ago

I've loved and used this tutorial for years. I hope you don't mind, but a friend and I wanted to make a song that centered around a tutorial, and this seemed like an ideal candidate. Thank you so much!

http://rndmedialabs.com/podcast/36/episode-24-the-...

yieldlymph4 months ago

good

yieldlymph4 months ago

great

syedsaad5 months ago
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TheGeek19846 months ago
Ah...LED Throwies...I remember, way before I signed up with Instructables, I was bored and surfing the internet, and I stumbled upon an article that had the main picture from this 'ible, and all the fun things you could throw them at and make them stick. Then there was a link, so I clicked it. Best. Decision. Ever. This was the first instructable I ever read, and the first I ever built. I would throw them at my front door and use the square patterns as sort of targets, like a game.

What was the first instructable you read/followed?

excellent idea, you could really make a statement at Christmas with these.

TfhRober7 months ago

New mixed
development with Commercial Retails shop and residential units at Yishun
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paverphalange8 months ago

Thats sweet

Jan_Henrik9 months ago

Very cool i like it!!! :)

motherprune9 months ago

Its amazing

mousepaper9 months ago

Thats superb

mousepaper9 months ago

Extremely good

Its tremendous :)

great

nice

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