Click on this link to see the LED Throwies in action in NYC thanks to resitor and fi5e!
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Signing UpStep 1Materials List
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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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.
Throwies on steroids -
The LED ULTRIE!
7 LEDs arranged in a ring
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/
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They arent rares, which you can see from the price (though they arent free)
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I will be sure to let you know if I do.Great work! Dropshipping
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I love it.Excellent article.I am definitely going to put this into use one of these days.
I will be sure to let you know if I do.Great work!
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It depends on the LED (+++Brightness=+++Power used) and the battery used. LEDs can last quite a long time before burning out so the problem is the battery. Using a higher capacity or adding a resistor (bigger batteries will make the Throwie bigger and heavier and resistors will lower the brightness. This is why people want to make them with solar cells and photoresistors. Solar cells gather the energy and photoresistors will tell when it is dark enough.