LED Throwies

Developed by the Graffiti Research Lab a division of the Eyebeam R&D OpenLab and originally presented on Instructables.com.

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.

LED throwies consist of only a few inexpensive parts and can be made for ~$1.00 per Throwie.

PARTS LIST:


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!



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.



1-inch wide Strapping Tape , Vendor: Your local hardware store
, Cost: $2.00 for one roll



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



Conductive Epoxy, Vendor: Newark
In One , Cost: $32.00 - optional