Circuit's Blog :
Return to BlogLED Display in Rotating Motion
Posted Jan 25, 2012 at 11:53 am
Figure 1
The project was created for displaying characters made of flashing LEDs to draw the image through the rotating board.
A ground plane is shown in the left picture having a double-sided PCB with other side being fully coppered. The display uses a motor where a normal 8cm fan is cut on the sides. The LED part consists of double colour LEDs consisting of green and red. The board will be fully populated once the first test on the display is running. The test ensures that all the shift registers are working properly and all the data lines are connected accordingly.
The motor provides the grounding for the rotating board and the upper bracket holds the +12V. Four M3 bolts are holding the big bearing on the bracket. Above the bearing is an IR LED covered with heat shrink tubing and running through the center rod is a piece of fiber optic that goes over an IR diode on the board. This will be used for serial data to send information on the rotating board.
During full operation, three colors will show during the rotation, the red, green, and orange/yellowish with 16 pixel image.
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2 years ago: the components should be maintained intact because when it starts spinning, you'll never know what could break loose :)