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Picture of LilyPad Arduino Blinking Bike Safety Patch
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I made this embroidered patch in a different instructable, but here I'll show you how to add flashing LEDs to your backpack for fun and safety. I used a LilyPad Arduino with a rechargeable lithium-polymer battery for flatness and re-usability. The LEDs blink in a marquee pattern, two at a time, in patriotic red, white and blue, in fitting with this year's "Re-Make America" Maker Faire theme. Check out this project on Make: Projects and the video from CRAFT.


Step 1: Materials and Tools

Picture of Materials and Tools
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Materials and Tools:
-scissors
-needlenose pliers
-sewing needle
-LilyPad Arduino with programmer and USB cable - Maker Shed

Power:
-LiPower board - Sparkfun
-lithium-polymer battery (and charger) - Sparkfun
OR
-LilyPad AAA battery holder (comes with the Maker Shed kit linked above)

-conductive thread - Lame Lifesaver
-conductive velcro - Less EMF
-sticky-back velcro (I got mine at Michael's)
-bag or backpack
-fabric patch to mount circuit
-small scrap of fabric for switch
-thread
-source code and schematic

Coil the leads of each LED: make the longer lead (positive) into a square spiral, and the shorter lead (negative) into a round spiral.

 
ingamarie4 years ago
Awesome, that was a fun project. I ended up using the 'Simple' Lilypad and only 8 lights, lining the back to protect the electronics, and making it snap on instead. Thanks so much!
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hadimatin5 years ago
You are great. Excellent.
Watch your patch animation while listening to Franz Ferdinand's Take me out. After the Ritardando at about 1:00 the LEDs sinc up. The same two blink on the quarter note and then it moves on counterclockwise.

BTW this instructable inspired me to make this...
http://www.instructables.com/id/Make-an-LED-Bow-Tie/
mbainrot6 years ago
Very nice Instructable :)
rolandblais6 years ago
Based on your cool tutorial, I cobbled together a marquee with my Duemilanove. Thanks for the inspiration!
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bekathwia (author)  rolandblais6 years ago
looks great! I also <3 animated gifs. =]
miked1236 years ago
Loved this instructable, especially the video. Hope you start making a lot more. (oh and awesome music at the end of the video)
biphenyl6 years ago
This is so cool! (and a fantastic animated gif, haha) The velcro was a great idea for removing at the airport or on a rainy day!
whopoder6 years ago
Very COOL!
randofo6 years ago
Where is the rap music?