I often ride bikes that end up not having working LED flashers, either because it's a friends bike who doesn't believe in safety, mountain bike, or the batteries are dead again. Since I always bring my camelbak with me on rides, I designed some LED flashers that are integrated into the bag.

Some of the advantages that I have found to this system are:
- The lights are higher up, for better visibility then flashers attached below the seat.
- Waterproof. I've thrown the whole bag in the washing machine with the flashers attached.
- Flash timing between the 2 flashers is out of sync, creating an eye catching beat frequency strobing pattern.
- Single 2AA power source.
- Angle provides excellent side and rear visibility.
- They're always there when I need them.
- Don't need to buy separate flashers for each bike, if you have more then one.
- Could be sewn on to a bike jersey.
- You can blind the biker behind you.

Check it out at:

Step 1: Materials


- The LED flashers were purchased on sale at Electronics Goldmine for $1.50. The housing turned out to be the worst cheap plastic, and the lens barely held on. However, the LED's were some of the brightest I had seen. They are actually daytime viewable. I didn't purchase these for this project, but since the LED's were so bright, and the board was tiny, they were perfect. They have so far survived 2 years of abuse and machine washing.

- Scrap Polycarbonate - the approximate thickness I used measures 3/32 (probably sold as 1/8in) and 7/32 (probably sold as 1/4 in)

- Wires - 6 approximately 6 inch small gauge wires

- One small switch. I used a smt click switch.

- 5 minutes epoxy

- Strong thread to sew the flashers onto the bag. Preferably an industrial grade thread, like something used to sew leather.
Thank you very much for this Instrucables. Absolutely brilliant. I have used a modified version of this in one of my instrucables. You can view it here: http://www.instructables.com/id/Voltage-Regulated-5-V-Bicycle-Dynamo-Light-USB/ <br><br>I will probably hook it up to my panniers. The taillight is very visible and cool indeed. Thanks for sharing this idea. Regards, <br>Sonnet.
Very nicely done. 5/5.
Congrats on being featured on the MAKE: Blog too!
Thanks, I have much more interesting stuff on the way.
&nbsp;Great! Can't wait to see it!
Great Job. wish I saw this last night. i had to change the LED's from my cheap flasher. they were suppose to be white, turned out to be yellow :( So i had a dodgi (not so cheap) head light that always stopped responding. know the Cheapo is working white. I will put it on my Baby carrige as a flash light...
I have to say again I really like this project. This is a favorite mine and congratulations on winning the contest! GOOD JOB!
Thanks, that's very cool! I didn't expect to win anything. I still have a video clip of it in action that I need to post.
Nice job. It's a very good idea.
Great instructable!!! I have added you Instructable to my MYTHBUSTERS group! rate:*****
Damm nice
Nice Instructable!
Cool! This give me all kinds of ideas. Just to let you know giving me ideas can be a dangerous thing. This is not only a cool project you made it look professional, KUDOS!

About This Instructable


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Bio: Daniel Bauen breathes new life into objects that have met their untimely demise in the junk pile.
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