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Project Help and Ideas » LED Cube! Help!
July 22, 2009 by BenjaminLynus |
Hey, so my first project is to make a 3d LED Cube: I saw an 8x8x8 somewhere online, and thought I'd make a 4x4x4. I found a how-to at: http://www.instructables.com/id/LED-Cube-4x4x4/ And got excited, and began to build: .jpg) until: but: I think I have a problem... I had the marquee project in the back of my mind, but didn't think about using the reverse-voltage effect. The way that the 4x4x4 cube is set up is: Each layer's LED cathode is connected. Each Column's LED anode is connected. This gives me 16 anode connections, and 4 cathode connections... 16+6=20, but there are only 17 I/O pins on the MCU. It took a bit to get this together and I'm trying to be lazy and not de-solder the entire thing.. any ideas? |
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July 22, 2009 by rajabalu21 |
Please take a look at 74HC164 datasheet. This could help you use 2 pins of your micro controller to control 8 different things. You could possibly use more than one to achieve what you want. |
July 23, 2009 by BenjaminLynus |
Update! So here is the video of my first test... I purchased the 74HC164, but haven't got it set up yet. As for the programming I just used the LED Marquee, but since I have only 17 I/O pins to work with, that only gives me 2.75 rows.. more videos with updates, and a tutorial and code will come when it gets done. |
July 23, 2009 by rajabalu21 |
Very nice. Let us know when you are done with cube. |
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