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Scrolling LED Project

Scrolling LED Project. Michael Turovskiy IME 458 Dr. Jianbiao Pan 6/5/2013. My Scrolling LED. My Scrolling LED. I purchased a starter kit from Carl’s Electronics at the beginning of the quarter because I thought that a Scrolling LED was something that I would actually use.

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Scrolling LED Project

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  1. Scrolling LED Project Michael Turovskiy IME 458 Dr. Jianbiao Pan 6/5/2013

  2. My Scrolling LED

  3. My Scrolling LED • I purchased a starter kit from Carl’s Electronics at the beginning of the quarter because I thought that a Scrolling LED was something that I would actually use. • I didn’t realize how much work it was going to be, but I really enjoyed every minute of working on it. • Especially, since IT WORKED!!

  4. My Scrolling LED • The purpose of this project was to become more familiar with microelectronics components and layouts. • Through this project I was able to accurately measure and draw out the various components that will go on my PCB. I was able to make a functioning schematic and layout. I used the program DipTrace to accomplish these tasks. • Finally, I was able to assemble all of the necessary parts, and found out that I had a skill for soldering small components to a PCB without any issues.

  5. My Scrolling LED Schematic

  6. My Scrolling LED Layout

  7. My PCB

  8. My PCB • In total my PCB has 42 components!! • The 8x8 LED matrix is able to work using only 3 shift regulators because each row of LED’s is connected to each other. This allows each regulator to control the 8 rows on each LED matrix. • There is actually a function on the Scrolling LED to show how this works!! • You can see how the LED is rastering the various rows, but it does it so quickly that your eye can not detect a change.

  9. My Scrolling LED Demonstration!!! Hopefully you can see it!! 

  10. My Scrolling LED • If you missed that… it said… • “Hi, my name is Michael and this is my Scrolling LED Project for IME/MATE 458. Thank You!! ” • This message can be changed at any time using the 4 tact switches on the front of the board.

  11. The Front of My Scrolling LED

  12. The Front of My Scrolling LED • The majority of my components (and everyone’s components) are on the front of my PCB. • I did my best to orient my components so that they would take up the least amount of space on the board. • I included 4 mounting holes on each corner of the board. • I included 3 fiducials on three corners of the board. • I also have a silk screen on the board that lays out exactly where all of the components should go, and which orientation they needed to be in to function correctly. • The board is run through a 9V battery

  13. The Front of My Scrolling LED • Bill Of Materials • 1 18 pin PIC microcontroller • 3 8x8 LED Array’s • 8 470 Ω resistors • 9 2222 A transistors • 1 LM317 regulator • 2 0.1 µF ceramic capacitors • 1 1 kΩ resistor • 4 10 kΩ resistors • 1 7805 regulator • 4 tact switches • 1 680 Ω resistor • 1 22 µF electrolytic capacitor • 1 power input (1.3x2.5 mm jack)

  14. The Back of My Scrolling LED

  15. The Back of My Scrolling PCB • You will notice that I have components on both the back and front of my PCB. • This was done to reduce space on the PCB. • The 3 parts you see on the back are the 3 74AC164 shift registers controlling the 3 8x8 LED array’s on the front.

  16. Conclusion • This project was extremely beneficial in my growing understanding of electronic components. I may not know exactly how my Scrolling LED project works, but I feel that it is a huge step that I was able to start from scratch (almost) and create a functioning PCB.

  17. Future Work • The starter kit came with 2 more resistors, and it would be interesting to see how the LED’s function differently based on which resistor is used. • It would be beneficial to order original parts from Digi-key and see if they work the same way as the components sent by Carl’s Electronics. • It would also be a great challenge to try to make the PCB for this Scrolling LED project even more condensed. • There is some “white space” where components could potentially fit. • Making a package, such as a belt, to encapsulate the Scrolling LED and make it even super COOLER than it already is!!

  18. Thank You!! • Questions?

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