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davidkyee

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  • davidkyee commented on chr's instructable LED Cube 8x8x8
    LED Cube 8x8x8

    Yes. I added several buttons to repeat, forward, backward and music mode. However, this requires a lot of code changes but it is doable.

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  • davidkyee commented on chr's instructable LED Cube 8x8x8
    LED Cube 8x8x8

    Just buy the chip. The code changes are quite involved and that's a lot of work you're asking someone to do for you for free.

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  • davidkyee commented on chr's instructable LED Cube 8x8x8

    If you use a raspberry pi, you don't need the atmega32. However, you're on your own for programming that thing particularly in terms of the setup and interrrupt routines.You can buy stuff like that on ebay or local electronics shop. With ebay, it's cheaper and you're stuck with a lot of excess.Any ribbon cable should work.I think I used 1k pull up resistors.

    Is it happening just on the bottom layer? Could be a bad chip if it's happening on all the layers for those two columns.

    Yes, but ribbon cables particularly colored ones make this a lot easier.

    You can use msgeq7 chip and modify existing codes that use that chip.

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  • Another problem I had was the connector ribbons connecting the two boards together. Check the wiring going from the 138 to the cables and check the cables themselves. That was my first time making cables and I discovered the hard way that a couple of them were bad. Also, check the cable going from the transistors to the layers.

    The problem is that those cheap kits don't make it easy for you to program since they don't provide code or instructions on how to program the chip. You buy the kit and the enclosed chip is preprogrammed.

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  • He's going through some personal issues which precludes him from supplying boards. However, I expect he'll be back once he has everything resolved. I've bought all of his products and have 3 cubes built by his products and I know others have as well. Be patient for him as his boards are probably the best out there and I've been looking at all of them.

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  • I built several cubes from PCB and right now I'm working on my first handwired board like yours. One mistake I made that I discovered before finishing was that I had the 10K resistors going from Vcc to the layers was set up incorrectly. Can't tell from your drawings if there's a problem but that was one part of the schematic that fooled me at first.From your drawing it looks like you are using an arduino mega 2560. If that's the case, the pinouts will be different from what the code is wanting. Supertech's cube (where we are now) uses an ATMEGA32 chip which has a different pinout from the mega.

    Did you use Supertech's PCB or is your controller hand wired?

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  • Sorry to hear you're going through with this. I've got 2 cubes built with this board. He's a nice person that may be having some issues right now. If you give him a chance he will make good. I am confident of that. I wrote code for him so I sort of know him but only through LED cubes and email.

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  • To everybody waiting for their boards, I built 2 cubes on those boards. They're definitely worth the wait.

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  • I can vouch for this guy. His word is good.

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