Project description:
For my final design project I decided to design and build a digital dot matrix message device. I’ve seen devices similar to this before and I wanted to find out if I could build one myself. The display consists of 7 LEDs in a vertical row. By moving them fast enough back and forth over each other, I can display a message which appears to be generated by a 7*n matrix of LEDs and not a single column of LEDs.
Link : Digital Message Machine
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