You will be the center of attention when you ride by on your bicycle with this cool gizmo attached to your wheels. With the use of LEDs (Light Emitting Diodes), you can make patriotic images appear to be suspended in air as your wheels spin. This construction article describes “Spoke Signals” — a series of three LED virtual image generators for your bicycle.
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Electronic Gadgets 2005-06 (schematic pdf files of figures 5, 9 & 13)