Distance-o-meter.

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gaz

Cycle Camera TV
Location
South Croydon
Looks like something similar to what AlexWarrior has been making in his spare time http://www.cyclechat.net/threads/alexwarrior-is-a-genius.94994/
 
Very neat project what they're working on, I'll have to trade ideas with them. £300 is not expensive at all though if it gets used as a law enforcement device - a handheld radar gun costs much more. The main cost in that prototype is the camera. Definitely expensive to justify for non law enforcement use though.

I estimate mine (http://alexwarrior.cc) costs around $250 total right now to build, but I'm using a fancier waterproof/impact proof sensor with a cone that shapes the ultrasonic pulse to be very narrow, also I'm using waterproof/tough enclosures, and instead of a camera, it logs the data to a microSD card which can later be overlayed on a camera video. So throw in a $199 ContourROAM, and mine's quite up there in cost.

Hold on a sec, lemmie see if I can make a quick photo of the latest prototype...

www.flickr.com/photos/20399788@N00/6848425740
 
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