The idea this time is to change any ordinary bicycle into a customizable full color display. Allowing you to display both text and movies while you're riding through the city. It's not only "fancy as hell", but also a good way to get noticed in traffic.
This project comes from a dusty idea shelf. Some friends of mine made a table mounted version for a school project some six years ago. There the lights where mounted to a rod that spins around on a motor, this is known as a propeller clock. They only had one color led's, about twenty of them and had many issues with getting the power to led's via bearings.
This is something of new challenge for me. Mainly because it involves my application to be placed on a moving object, necessitating battery power(or maybe inductance powering?) and designing a mounting technique.
Foundation
The basics come from the limitation of the human eyes/brain, specifically the Persistence Of Vision(POV) effect. This POV effect occurs when a light source flashes at such a high frequency the brain averages out these flashes to a continuous light with a lower brightness.
This happens in every household lighting about 50 times/second but you'll be non the wiser. So, knowing this, if the lights on my bicycle wheel simply flash fast enough on the same spot in the rotation of the wheel your eyes/brain will be tricked into thinking it hasn't moved at all.
General Bill Of Materials(BOM)
General Bill Of Materials(BOM)
Hall sensor will provide a base to calculate the speed of the wheel and calibrate the position of the led's in the rotation.
RGB-led's on both sides will make up the screen. For construction simplicity they'll be in a matrix configuration.
Some for of wireless communication to change the image.
Memory to store the image. Some kind of program or app to control and change the image.
RGB-led's on both sides will make up the screen. For construction simplicity they'll be in a matrix configuration.
Some for of wireless communication to change the image.
Memory to store the image. Some kind of program or app to control and change the image.