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I made a small LED panel

(www.stavros.io)
154 points Brajeshwar | 1 comments | 09 Oct 25 15:31 UTC | HN request time: 0.217s | source
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smusamashah ◴[21 Oct 25 08:15 UTC] No.45653616[source]▶
I dont understand it. The resolution is only 8x8. How does the animation at the end looks so smooth and way higher resolution?
replies(1): >>45653923 #
stavros ◴[21 Oct 25 09:15 UTC] No.45653923[source]▶
The diffuser fakes the resolution, basically, by blending the colors together physically.
replies(1): >>45656081 #
smusamashah ◴[21 Oct 25 14:13 UTC] No.45656081[source]▶
I believe you, my brain doesn't. Those movements are so smooth. The line where two different colours merge have no sharp edges and look perfectly curved. Only thing edgy was the very last blinking animation where there weren't any colours.

Thinking more, if there were only 4 LEDs I can imagine how they would look like diffused.

Initially I was thinking if 8x8 can show all those smooth details and motions, can it be used to show any other higher resolution imagery instead of just moving colours.

replies(2): >>45656439 #>>45659446 #
1. dekhn ◴[21 Oct 25 18:14 UTC] No.45659446[source]▶
A diffuser is basically applying a convolution to the underlying pixel array (moving the diffuser away from the LED increases the convolution width, but unfortunately also reduces the intensity).

I don't think you can exploit that to show something higher resolution than the original pixel array,