I made a small LED panel

On the topic of small LED panels, Jason of Evil Genius Labs has been making some really small LED panels [0] with addressable 1mm x 1mm LEDs (yes, individually addressable AND only 1mm on each side!). Fitting 128 onto a 1" circle is pretty sweet.

I keep meaning to design some PCBs with them [1] but it's too far down my ever-growing list of projects to see the light of day...

[0] https://www.evilgeniuslabs.org/one-inch-fibonacci128

[1] https://www.lcsc.com/product-detail/C5349953.html

Why are you doing this to me

Ah, the joy of being a Brit. That first link is just full of purple rectangles containing the text "content not viewable in your region" (Imgur).

I'm feeling safer already. sigh.

Looks like a fun site though, I'll take a look when I'm not on my work computer.

Those are just really small WS2812, I get those at 160 led per meter on a strip of 5 bucks per meter. I just mean to say they are cheaply available in many form factors. I use them a lot in cosplay clothing.

Those look like normal 2.5-3mm LEDs, that is big difference to 1mm² LEDs. The circle disc from OPs link has 2.5x higher LED density, and they could be probably packed even more densely in a grid.

Kingbright recently released 01005 (0.45mm x 0.25mm x 0.2mm) sized LEDs, which afaik are one of the smallest ones easily available. One neat idea would be to pack those on DIP14 sized pcb, making tiny neat character display. I guess something like 5x7 or 6x8 matrix could be doable with small mcu to drive them.

For those 1mm addressable RGB LEDs I've been thinking how you could do cool cyberpunk looks by stringing them on some hairthin magnet wire and sticking them on your body/face/hair/etc. Blend them in with some latex or something if needed. Just need to hide the controller/battery somewhere.

Looks like they're WS2812B-2020, like on this PCB:

https://www.wemos.cc/en/latest/d1_mini_shield/8x8_rgb.html

BTW: The 2020 are super bright, but the 1010 not so much.