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Scrolling LED display in your computer for less than $20

 
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Alan
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Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB

PostPosted: Tue May 16, 2006 5:27 pm    Post subject: Scrolling LED display in your computer for less than $20 Reply with quote

"The total cost for this project was less than $20. The most expensive parts were the 7 segment displays and the ICM7218 chip. I used 0.56" tall digits. It took 4 of the LED packages to get 8 characters. The width of all of them together was exactly the same as a floppy!

First off, here's the schematic. Don't let it scare you, it's really not as complicated as it appears. Essentially you tie all the A segments together, the B segments together, etc. The only gotcha is one segment is upside down (in order to make a colon for a clock) and it is wired slightly different than the other 3."


http://blog.fozztexx.com/projects/?postid=57

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