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My Covert Public Message display from last year's Maker Faire is back and has a new kind of hidden message display: This year's project uses a series of LEDs to display two alternating messages, one in visible light and the other in invisible infrared light. The infrared LEDs are visible by looking at them through a digital camera (still, cell phone camera, video camera, etc). The LEDs display the messages via Persistence of Vision. The LEDs are mounted to the spokes of a bicycle wheel, spun by a fan motor (with speed control). The display is synchronized to center the messages and has Plexiglas covers to protect the viewer from moving parts.
Web site: http://jetson.googlepages.com/covertpublicmessages2
Robert Hermes
Father, Inventor, Engineer, First Responder, Fixer of things, Woodworker, blood donor, KG6VOT
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