
DIY Rotary Encoder
thingiverse
Built it at http://www.mci.supsi.ch/senseable-art to detect motion in any direction. A video is available here https://www.flickr.com/photos/tamberg/31681948905. For the wiring of LED, LDR, consult this tutorial pages 19 and 26. Material: Arduino USB cable Breadboard M/M jumper wires 5mm LED - I used a white one but any color works fine 5mm LDR - e.g., https://www.adafruit.com/product/161 M3 nuts & bolts
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