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Hobby Components 8x8x8 Cube Kit (HCKITS0050)
http://forum.hobbycomponents.com/viewtopic.php?f=105&t=1969
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Author:  Cube1 [ Tue Mar 13, 2018 4:25 pm ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

andrew wrote:

I take it that not even the 10mm LEDs are lighting up now either?


^^This is correct^^. I removed U3, the 10mm LEDs came on the first time I plugged it in, for a short period, alas, when I plugged it in and out again.... nothing. Couple of things to note, I had to place two smaller LEDs in two of the feet, as only two came in the kit, don't think it should make a difference, just giving a full picture. When I tap the pin circled on U2, the feet light up, and stay lighting.

Author:  andrew [ Wed Mar 14, 2018 9:48 am ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

Quote:
I removed U3, the 10mm LEDs came on the first time I plugged it in, for a short period, alas, when I plugged it in and out again.... nothing.


Quote:
When I tap the pin circled on U2, the feet light up, and stay lighting.


That pin controls a transistor which switches the base LEDs on and off so that makes sense. It also tells me that either there is a bad connection on that pin, or far more likely, the microcontroller isn't controlling the state of the LEDs because it's not running. If the the microcontroller isn't running then nothing would work and it would also make sense that the base LEDs would randomly turn on or off.

I think the next thing you need to do is to check the soldering of all the pins on U2 and components associated with it - R1, C2, C4, C13, C14, & X1. Check for pads missing solder, dry joins, and additionally for U2 that none of the pins of its IC socket have bent under the socket and not gone though the pads hole.


Quote:
I had to place two smaller LEDs in two of the feet, as only two came in the kit


Sorry about that. If you could send an email about this to sales (at) hobbycomponents.com with your order number we'll sort it our for you.

Author:  Cube1 [ Thu Mar 15, 2018 6:38 pm ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

andrew wrote:
Sorry about that.


No worries mate, wasn't a dig just letting you know. I have checked all of those connections, all check out. I got a multimeter, is there anything I can check with that that might help?

Author:  andrew [ Fri Mar 16, 2018 9:51 am ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

Quote:
No worries mate, wasn't a dig just letting you know.


No a problem, if they were missing from the kit wecan replace them but probably best wait to see if we can get to the bottom of why your cube isn't working first.

Code:
I got a multimeter, is there anything I can check with that that might help?


Yes, that would be helpful. I still suspect that the microcontroller isn't running for some reason so I'd like you to check its power supply and crystal pins. Can you set your meter to its voltage range and measure the voltage across the following pins:

Negative lead on U2 pin 8 and positive lead on U2 pin 7

Negative lead on U2 pin 22 and positive lead on U2 pin 20

Negative lead on U2 pin 8 and positive lead on U2 pin 9

Negative lead on U2 pin 8 and positive lead on U2 pin 10

Can you tell me what voltage you read for each of the 4 measurements above. If you need help in identifying the correct pins just let me know.

Author:  Cube1 [ Fri Mar 16, 2018 9:29 pm ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

andrew wrote:
Yes,that would be helpful.
Can you tell me what voltage you read for each of the 4 measurements above. If you need help in identifying the correct pins just let me know.


We actually bought a second kit and rebuilt it, as we need to finish for next week and do some programming on it ourselves for a team project in software development degree we are undertaking. We got the second cube built and functioning today, thank you for your help Andrew, I will be back onto you as soon as we finish our exams, to see can we get the first one sorted. Much appreciated. :geek:
We are going to try and implement this in a 3d fashion: https://en.wikipedia.org/wiki/Wa-Tor , obviously we will only have one colour, but the pattern should be demonstrated, I'll keep you posted. :)

Author:  andrew [ Sun Mar 18, 2018 8:40 am ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

Quote:
I will be back onto you as soon as we finish our exams, to see can we get the first one sorted.


Ok, no problem

Quote:
We are going to try and implement this in a 3d fashion


It looks looks similar to the game of life. It will be very interesting to see your what you manage to create.

Author:  geekazoide [ Sat Apr 28, 2018 12:39 pm ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

Hi there, I seem to be having issues with my cube, similar to what Cube1 was having recently.

I've built it all up, but when powered on, the cube doesn't behave as expected. Each power on results in something different. Either the 4 white leds illuminate and nothing else, or nothing illuminates, or the 4 white leds turjn on dimly then eventually a couple of blue leds turn on etc.

I've checked my soldering, and pretty sure it's ok (though there's always the chance I may have missed something).
I completed the voltage checks you asked for with Cube1 a couple of weeks back. I read:

5V between pins 8+7 on U2,
5V between pins 22+20 on U2,
0.7V between pins 8+9 on U2,
0.4V between pins 8+10 on U2.

Also, the two tack switches (mode and reset) don't seem to do anything when pressed. I've checked the connection between the switches and the chip itself, and all seems good. The power supply is rated 9V at 2.0amps.

Any ideas?

Author:  andrew [ Wed May 02, 2018 8:20 am ]
Post subject:  Re: Hobby Components 8x8x8 Cube Kit (HCKITS0050)

I believe you have also contacted us directly and the issue is being dealt with there.

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