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bike projector heads down display stationary1 Heads Down Display for Bicycles

bike projector heads down display in motion1 Heads Down Display for Bicycles

MAKE@SXSW 2013So far the coolest thing I’ve seen at SXSW has been this clever early-stage prototype from our own Matt Richardson. It’s a “dynamic bike headlight” that projects your speed (and potentially other useful information) onto the road in front of you as you ride.

The prototype has a Raspberry Pi for a brain, which is connected through its onboard HDMI port to an LED pico projector mounted between the handlebars. A Hall effect sensor, connected to the Pi’s GPIO pins via an adafruit Pi T-Cobbler breakout kit, detects revolutions of the front wheel. The software counts these, converts their rate into a speed in MPH, and sends the numbers to the projector for display on the road surface.

Matt showed off the proof-of-concept build this morning at Bike Hugger’s Built: Make & Tell event.

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Right now, the setup is battery-powered, and is limited to one hour’s use. Matt’s already making plans for dynamo power in a later build. Check Matt’s Flickr set, linked below, for more pics of the system in action.

Dynamic Bike Headlight

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Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.


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