Design Con 2015
Breaking News
Blog

Creating an 8x8x8 3D LED Cube: Testing the RGB LEDs

NO RATINGS
Page 1 / 2 Next >
View Comments: Oldest First | Newest First | Threaded View
Page 1 / 4   >   >>
Max The Magnificent
User Rank
Blogger
Brilliant!
Max The Magnificent   7/31/2014 9:36:10 AM
NO RATINGS
@Steve: I used an off-cut piece of 0.1" Veroboard, spread the tips of the leads into the exposed slots of the serrated edge, and then slid the LED housing toward the Veroboard, thereby forcing the leads further apart.

I didn;t really understand what you were saying here until I watched your video, at which point I thought "Brilliant!" I'm really looking forward to reading your future blogs on this topic showing the techniques you used for straigntening the wire and the jigs you build to help in the assembly of this cube.

Max The Magnificent
User Rank
Blogger
Oh No -- not another project!
Max The Magnificent   7/31/2014 9:42:10 AM
NO RATINGS
@Steve: As you know, your work on this has inspired me to build my own 8x8x8 cube (how could I live with a 4x4x4 cube knowing that you were cackling over an 8x8x8 beauty?)

Now, you are using regular RGB LEDs, which will involve lots of multiplexing and stuff. I've decided to go with the Adafruit NeoPixel versions of these devices. Each of these LEDs contains its own controller with current limiting resistors and three 8-bit PWM drivers (one per RGB channel).

I've already taken delivery of the LEDs -- I'm eagerly awaiting your future construction blogs to get ideas for the building of my own cube...

Just what I didn't need -- yet another project LOL

Steve Manley
User Rank
Blogger
Re: Brilliant!
Steve Manley   7/31/2014 11:50:39 AM
NO RATINGS
@Max: I didn;t really understand what you were saying here until I watched your video, at which point I thought "Brilliant!" I'm really looking forward to reading your future blogs on this topic showing the techniques you used for straigntening the wire and the jigs you build to help in the assembly of this cube.

I have to agree; I could have stated this a little more clearly. For example, "I used the serrated edge from an offcut piece of Vero board as a comb to spread the led leads out."

Steve Manley
User Rank
Blogger
Re: Oh No -- not another project!
Steve Manley   7/31/2014 12:04:51 PM
NO RATINGS
@Max: Now, you are using regular RGB LEDs, which will involve lots of multiplexing and stuff. I've decided to go with the Adafruit NeoPixel versions of these devices. Each of these LEDs contains its own controller with current limiting resistors and three 8-bit PWM drivers (one per RGB channel).

I have taken delivery of 10 of those Adaruit NeoPixels myself but haven't gotten round to trying them out yet. A cube built with these little beauties would make the programming a little easier with no multiplexing required and no software PWM to write. The downside would be the increased current consumption due to the non multiplexing. The current for a NeoPixel cube if all led's are white could be between 20-30 amps as apposed to just under 4 amps for my cube which will be using multiplexing.

You and I still need to discuss whether or not one of the PCB's I had manufactured for my cube (another blog coming soon) would be suitable for a NeoPixel version.

Max The Magnificent
User Rank
Blogger
Re: Brilliant!
Max The Magnificent   7/31/2014 12:17:50 PM
NO RATINGS
@Steve: I could have stated this a little more clearly. For example, "I used the serrated edge from an offcut piece of Vero board as a comb to spread the led leads out."

I don't think there was a problem with the way you stated it -- it's just when you said "Veroboard" I immediately thought of sticking the LED leads thru the holes ... and my mind went off on the wrong track. As soon as aI saw the video I realized what you meant and I also realized it was a really ingenious solution to the problem.

 

Max The Magnificent
User Rank
Blogger
Re: Oh No -- not another project!
Max The Magnificent   7/31/2014 12:19:48 PM
NO RATINGS
@Steve: The current for a NeoPixel cube if all led's are white could be between 20-30 amps as apposed to just under 4 amps for my cube which will be using multiplexing.

"More Power" as Tom Allen would say. Surely this translates into brightness. If we both have our cubes on "full whack" -- then mine will be brighter that yours (happy dance :-)

Max The Magnificent
User Rank
Blogger
Re: Oh No -- not another project!
Max The Magnificent   7/31/2014 12:22:29 PM
NO RATINGS
@Steve: You and I still need to discuss whether or not one of the PCB's I had manufactured for my cube (another blog coming soon) would be suitable for a NeoPixel version.

I'm up to my armpits in alligators fighting fires without a paddle at the moment (i never metaphor I didn't like) -- I'll be working from a hotel in Louisiana next week (I'm going down there with my wife and son to celebrate her birthday because that's where her family lives) -- so let's chat after that when we've posted your next two blogs on the construction of your cube and i have a better idea as to what will be required for mine...

Steve Manley
User Rank
Blogger
Re: Oh No -- not another project!
Steve Manley   7/31/2014 1:07:52 PM
NO RATINGS
@Max: "More Power" as Tom Allen would say. Surely this translates into brightness. If we both have our cubes on "full whack" -- then mine will be brighter that yours (happy dance :-)

Trouble is yours will be so bright you'll need sunglasses to watch it. You could always use it as a beacon to warn ships of pending doom lol.

Steve Manley
User Rank
Blogger
Re: Oh No -- not another project!
Steve Manley   7/31/2014 1:09:09 PM
NO RATINGS
@Max: so let's chat after that when we've posted your next two blogs on the construction of your cube and i have a better idea as to what will be required for mine...

No problem..

Max The Magnificent
User Rank
Blogger
Re: Oh No -- not another project!
Max The Magnificent   7/31/2014 1:17:17 PM
NO RATINGS
@Steve: ...yours will be so bright you'll need sunglasses to watch it.

My wife says I look cool in my aviator sunglasses :-)

Page 1 / 4   >   >>
Most Recent Comments
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Top Comments of the Week