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Picture of LED Throwies
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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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amazedgreen9 months ago

AMAZING!

fastbobble9 months ago

Its spectacular :)

gorgeddamp9 months ago



Thats wonderful...

clearedeager9 months ago

This is awesome!

illrings10 months ago



Its splendid :)

airbugger10 months ago

nice

bulbdesigner10 months ago

Or you may order magnets from www.hobber.ro

It has over 230 neodymium and ferrite magnets


Thats one awesome

Neodym10 months ago

and if you'd like to get the best price:

http://www.supermagnetic.de

Scheiben-Neodym-Magnete15-05.jpg
headlymph10 months ago

great

tealrink10 months ago

GREAT

grousebandit10 months ago



Thats nice

cool

harechubby11 months ago

wonderful

jiffymanager11 months ago

wonderful

jiffymanager11 months ago

nice

ritchie5611 months ago

May I make a suggestion. LEDs by definition do not regulate the current passing through them. In other words, if you don't limit the current passing through them with a series resistor, then they will allow as much current to flow through them as the battery can deliver. The LEDs you mention have a maximum current limit of 25mA (0.025A). The button batteries can delivery 10x that much current in a short period. The result will be a very shortened LED life and a burned out battery. Red LEDs drop about 2 volts and the battery can deliver 3 volts, so a 50-ohm series resistor is in order (for a safe 20mA current flow). The blue and green LEDs need 3-3.6 volts to operate and would require 2 batteries stacked together to produce 6 volts. For blues and greens I would use a 130-ohm series resistor. By doing this, the LEDs will illuminate much longer. The resistor can be put on the positive or negative side of the battery between the battery and one of the LED leads.

calmlunch11 months ago

good

calmlunch11 months ago

super

clapfilk11 months ago

super

clapfilk11 months ago

super

good

spongeraffle12 months ago

Excellent...!!

great

clickyummy1 year ago

nice

clickyummy1 year ago

nice

clickyummy1 year ago

nice

bearblue1 year ago

good

bearblue1 year ago

good

bearblue1 year ago

good

When I started reading this, I thought, $1? That's okay, but how long do they last? It's a really cool idea to cheer up an area, but not so much if you only get a few hours. Then I saw you get 1-2 weeks. Simply brilliant!

fadecomic1 year ago

I'm going to take a handful of these in blue to a con dressed as Goku. KAMEHAMEHA!

I just took a throwie, added a snowflake as a diffuser. It's now a "Snowie!". http://inventorartist.com/dream-walk/

gazumpglue1 year ago

These are really neat. It's a shame Christmas just passes. The kids would of had a lot of fun with these. There is always next year!

Gonna Try it

Same here

These are really neat. It's a shame Christmas just passes. The kids would of had a lot of fun with these. There is always next year!

tbuchanan21 year ago
Where do you get the leds
Where is the epoxy used?
Awesomeness! Very cool
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