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This is a link post Ping pong ball led wall V2
Inspired by an earlier link. Here's more ping pong action. There is a V3 but our frazzling modern attention span might get gumphy.

(Damien Hurts just forgot a really good idea, Mon 23 Aug 2021, 2:03, Reply)
This is a normal post I've used ping pong balls before as diffusers
But I really want something that fits tight on my LEDs, rather than by mostly luck.
 (I helped save b3ta! gaijintendo Regular Member, Mon 23 Aug 2021, 7:03, Reply)
This is a normal post Also, for mine I used a toolboard for a holed back
And a Twinkly Christmas tree light set for the actual do thingery
 (I helped save b3ta! gaijintendo Regular Member, Mon 23 Aug 2021, 7:05, Reply)
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For small WS2812 arrays I use the diffuser layer sheet removed from any old LCD screen BUT its not the holy grail of an on device diffuser as it requires a little distance to work.
 (Ning Has taken out flounce insurance., Mon 23 Aug 2021, 11:34, Reply)
This is a normal post I'm sure I've seen Poundland LEDS with little diffusers
Balls, butterflies and that sort of thing, that just sit neatly on the LED.
It seems strange you can't easily buy a bucket of them off Alibaba.
 (I helped save b3ta! gaijintendo Regular Member, Mon 23 Aug 2021, 11:38, Reply)
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I've seen them as well and also have failed to buy them in bulk. Thats Dragons Den terrible niche idea #494 sorted.
 (Ning Has taken out flounce insurance., Mon 23 Aug 2021, 11:53, Reply)
This is a normal post What about the single dot flat clear lego pieces, would they fit?

(Mehitabel_Itrang, Mon 23 Aug 2021, 11:53, Reply)
This is a normal post That's something I can investigate
Not sure how snug a fit, but I love the idea of being able to build on it.
 (I helped save b3ta! gaijintendo Regular Member, Mon 23 Aug 2021, 11:55, Reply)
This is a normal post filtered for transparent
here
 (Mehitabel_Itrang, Mon 23 Aug 2021, 12:14, Reply)
This is a normal post Slightly off the wall idea.
Abrade the surface of the LEDs, ideally with a gritblaster using fine media.

Edit: Bonus odd idea, PP or PE mouldings, eg.
www.evolab-th.com/16763423/96-well-nonskirted-pcr-plates
 (I helped save b3ta! FeralCatMan Long ads need comments sections, Mon 23 Aug 2021, 13:23, Reply)
This is a normal post
can confirm fine grade sand paper works
 (I helped save b3ta! artifus is doing it all wrong, Mon 23 Aug 2021, 23:37, Reply)
This is a normal post I was thinking on a bigger scale for a big array.
Stick the leads through some thick foil and blast many in minutes.
 (I helped save b3ta! FeralCatMan Long ads need comments sections, Tue 24 Aug 2021, 19:18, Reply)
This is a normal post Wait, you can buy addressable less on wires??
Fuck. I made a 29x5 array as a scrolling marquee banner and had to solder every single one of those bastards together. Eight hundred and something individual joints. That's a week of evenings I won't get back...
 (I helped save b3ta! pineapplecharm D d M Y, H:i, Mon 23 Aug 2021, 13:32, Reply)