Electronics > Projects, Designs, and Technical Stuff
kCube - LED cube design revisited
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ataradov:

--- Quote from: tatus1969 on March 26, 2018, 10:59:41 pm ---Right, i'm also curious how transparent that thing actually will become. But I think the flex PCB part will be good enough, for example:

--- End quote ---
That look like a 3D render.
tatus1969:

--- Quote from: ataradov on March 26, 2018, 11:14:15 pm ---
--- Quote from: tatus1969 on March 26, 2018, 10:59:41 pm ---Right, i'm also curious how transparent that thing actually will become. But I think the flex PCB part will be good enough, for example:

--- End quote ---
That look like a 3D render.

--- End quote ---
not necessarily, look at the dirt spots and reflections on the right. But anyway, I'll show you once I have it here.
firehopper:
they make ws2812b in led 5mm led form too you know..
tatus1969:

--- Quote from: firehopper on March 27, 2018, 01:04:32 am ---they make ws2812b in led 5mm led form too you know..

--- End quote ---
I was considering them, and would have wanted them for their "non-directivity", but that would have ruined my no-soldering-DIY and cost-effectiveness goals. And it would have been a PITA to solder them to FPC (maybe bent wires??)...


--- Quote from: MasterT on March 26, 2018, 11:11:03 pm ---I made 8x8x8 led cube, and created a software.  It was not clear to me in the beginning, what exactly I want to see, just need something for Christmas.  Tweaking light show I realized, why led cube so magnificent, because you can walk around it and have 360 degree view from all sides. Common crystal clear led is lighting in all direction, even from the back side, so less efficient. It's like a holography, fully 3D. 

--- End quote ---
Do you have pictures or videos of your cube? I would be interested.


--- Quote from: MasterT on March 26, 2018, 11:11:03 pm ---And here is your mistake, the best you can get from ws2812 is about 120-130 degree. Flat image, white plastic cases would ruin all perfection whenever you slightly move your head. Sorry for disappointing.

--- End quote ---
I have them here and visually tested their directivity. Their inner supporting frame reflects quite some light, which makes them usable for almost 180 degrees (half sphere). I say usable, because the intensity at large angles is limited of course. This is the reason why I placed them horizontally. A vertical orientation facing to the viewer would have ruined that 360 degree walk-around impression. I'm dreaming of asking Worldsemi to make a variant with clear housing, in a far far future  ;)
firehopper:

--- Quote from: tatus1969 on March 27, 2018, 08:44:42 am ---
--- Quote from: firehopper on March 27, 2018, 01:04:32 am ---they make ws2812b in led 5mm led form too you know..

--- End quote ---
I was considering them, and would have wanted them for their "non-directivity", but that would have ruined my no-soldering-DIY and cost-effectiveness goals. And it would have been a PITA to solder them to FPC (maybe bent wires??)...


--- Quote from: MasterT on March 26, 2018, 11:11:03 pm ---I made 8x8x8 led cube, and created a software.  It was not clear to me in the beginning, what exactly I want to see, just need something for Christmas.  Tweaking light show I realized, why led cube so magnificent, because you can walk around it and have 360 degree view from all sides. Common crystal clear led is lighting in all direction, even from the back side, so less efficient. It's like a holography, fully 3D. 

--- End quote ---
Do you have pictures or videos of your cube? I would be interested.


--- Quote from: MasterT on March 26, 2018, 11:11:03 pm ---And here is your mistake, the best you can get from ws2812 is about 120-130 degree. Flat image, white plastic cases would ruin all perfection whenever you slightly move your head. Sorry for disappointing.

--- End quote ---
I have them here and visually tested their directivity. Their inner supporting frame reflects quite some light, which makes them usable for almost 180 degrees (half sphere). I say usable, because the intensity at large angles is limited of course. This is the reason why I placed them horizontally. A vertical orientation facing to the viewer would have ruined that 360 degree walk-around impression. I'm dreaming of asking Worldsemi to make a variant with clear housing, in a far far future  ;)

--- End quote ---
the apa102 2020 sized ones are clear I think. at least the ones I saw for sale on evilbay seemed to have a clear housing.
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