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Instructables user frenzy put it well in this “Putting A Car Horn On Your Bicycle” Instructable:

I’ve found in my biking adventures, drivers are aloof, distracted and just plain blind to us little pieces of metal on the road. I’ve also found giving a little shout before a driver makes a right hand turn with out signaling is a great way to save your life, but i like my voice to not be raspy after running around town… SO the car horn project was BORN!

Here’s my take on the same idea:

horn1.jpg
horn2.jpg

Video (with noise) here; another Maker having a blast with his bike car horn in action here. Any other loud pedal-powered projects you’d like to share, please comment below!

Luke Iseman

Luke Iseman

Luke Iseman makes stuff, some of which works. He invites you to drive a bike for a living (dirtnailpedicab.com), stop killing your garden (growerbot.com), and live in an off-grid shipping container (boxouse.com).


  • Frenzy

    second time this week my projects have been mentioned on the Make: blog! I’m really glad it inspired you! maybe we should get together and dress our bikes up as cars and ride around town…

    groovypancakes.com

  • Jeremie

    I hate when that happens, I’m working right now on a horn for my bike, I was waiting to finish it for the summer… ARGGHHHH

    Anyway nice one…

  • Lenore

    We had an ooga horn on our tandem a few years back. It was quite helpful in making folks take notice.

  • cars

    good idea

  • bozar88

    i have car horn too. it’s powered form old laptop li-ion cells (they give more than 12 Amps!). See a video where the whole system is presented:

    you may also look at these images: http://czynnikludzki.blogspot.com/2008/09/upgrade-roweru-ii.html