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Color changing scoreboard

Color changing scoreboard. By Koffi Selom Egbeto 04/17/2009. Background information. This color changing scoreboard works just like a normal scoreboard, to keep track of scores during a game or games.

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Color changing scoreboard

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  1. Color changing scoreboard By KoffiSelomEgbeto 04/17/2009

  2. Background information • This color changing scoreboard works just like a normal scoreboard, to keep track of scores during a game or games. • Only difference about this scoreboard is that, it has to do with different colors changing LEDs or lights in a scoreboard which makes it fun and unique. • In this project, a 5 x 7 LED Matrix was used with a HC08 QG8 series, a 74138 and a 74154 decoder, some resistors and PNP transistors.

  3. LED Matrix Project used for a color changing scoreboard • First this idea came to mind while I left the gym one day after practice and I kind of added a little twist to it. • Thought it was going to be a fun and entertaining project to have a scoreboard with different colors going on as the scores change, even though it is giving me a hard time to work on it.

  4. The way this scoreboard suppose to work is that when the buttons are pressed, the score changes, and according to the score, the lights or LEDs on the Matrix will automatically change colors due to how high, equal or low the score is. • Concerning the scores, whenever the game is going on, the higher score should light up in “red”, the lower in “green” and if the score is the same then it should light up “orange or yellowish”

  5. Here is some calculations used to figure out some of the resistors. For the red LED I got 100 ohms for R. 3v= Iled (15mA) * R + 1.5v R= 1.5v/15mA  100 ohms • For the green LED I got 33.33 ohms for R. 3v= Iled (15mA) * R + 2.5v R= 0.5v/15mA  33 ohms

  6. Block Diagram High score= red Low score= green

  7. Score is tie, color changes to orange for both.

  8. Schematic

  9. Board Layout

  10. Purpose of transistors and more

  11. Thank You! Any Questions????

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