LED Cube

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LED Cube

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LED Cube

Postby morrigan » Sat Dec 31, 2016 9:42 pm

Sanity completly departed and I decided that project involving a lot of soldering, al lot lot of soldering actualy would be a fun idea.
However having seen numerous 3D LED cubes on the web, and after finding a kit for a 8 x 8 x 8 cube for a nice price, I couldn't resist.

Tip: if you want to make one these, a multimeter and temp controlled soldering iron are a must!

Pretty basic kit! Even the instructions were for a different LED cube :angry-banghead:
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First order of business was to test every LED, all 512 of them. I did not want to find a dead LED in the middle of the finished cube!
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I also made a template for assembling the layers of LED's:
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Needs more fusewire
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 9:48 pm

You then have to preapre a whole heap of little socket posts for the LED array to mount onto.
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Tip: Rummage out a large plastic bag to work in, to reduce pingage and make cleaning up the mess easy!
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All done!
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Then solder the little blighters onto the circuit board.
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As you can see there's alot of tedious rinse and repeat steps for this project, so its not suitable for those with little patience or bull in a china shop types!
Needs more fusewire
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 9:59 pm

Following the sodlering rule of thumb, of working from least heat sensitive components to most heat sensitive, the mounts for the various integrated circuit chips were soldering in place, taking care to get the orientation correct!
The power socket and switch was also installed
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Then the resistors and capactiors are installed, orientaion of these is not important, however lining them up the same way makes for a neater looking project:
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Bending the component legs out, holds them in place until they can be soldered.
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Then the power LED and timing crystal after triple checking polarity :
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Last of all the IC's are plugged into their sockets:
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Needs more fusewire
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 10:13 pm

Hey ho hum, more tedious prep work ahead!

The LED's all need there legs bent so they can be built up into a cube:

Take an LED, note the polarity of each leg, as thios is critcal for the whole shebang to work.
Using the menemonic: "A longer leg is a positive thing" helps with remembering which leg is postive (A - Anode - longer leg) and which is the negative(the cathode has the shorter leg and is on the flat side on the LED case)
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First the Cathode (-) is bent out at 90' :
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Leaving the pliers in place, bend the annode leg thus:
The annode should lie closer to the LED base than the cathode.
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Do this 512 times :shock:
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 10:22 pm

Lay the LEDS out like this, all of the LED's in Column C8, have one more bend added to their cathodes.
It's much easier to install a column, then solder the joints where the legs touch the leg of the adjacent LED (ooh errr!) - sodler anodes to anodes and cathodes to cathodes. Simples! :?
Note the polarity markings on the template!
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Stragetically placed pliers and heat sink clamps can help keep things in line during assembly, especially for the starter column!
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One a layer is done, I tested the LED's to make sure none had been cooked!:
An ounce of prevention and all that....
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 10:27 pm

Each completed layer was installed on the base plate, and of course tested to ensure no surprises later on:
The cathodes from C8 are joined to the corresponding C8 column on the layer behind
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I used component leg cutoffs to reinforce the cube.
Just keep soldering, just keep soldering.....
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Done!
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Re: LED Cube

Postby morrigan » Sat Dec 31, 2016 10:31 pm

Needs more fusewire
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Re: LED Cube

Postby casper » Sat Dec 31, 2016 11:44 pm

wow morrigan :) looks cool lit up, bit drunk so have another looks tomorrow
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Re: LED Cube

Postby steve131 » Sun Jan 01, 2017 3:51 pm

very good ,lot of hard work . :clap:
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Re: LED Cube

Postby Mark » Fri Jan 06, 2017 1:24 am

I used to love electronic kits as a kid. This really takes me back :D
Lovely neat work. Just a shame I'm back in Shanghai for a week and YouTube is blocked here :angry-banghead: :angry-banghead: :angry-banghead:
Cheers
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