iefbr14
5 hours ago
Unfortunately the video link points to https://example.com/docs
portalcell
4 hours ago
From git history on the readme.md
jolmg
2 hours ago
Also, the second picture is a video link with the correct URL.
5 hours ago
Unfortunately the video link points to https://example.com/docs
4 hours ago
From git history on the readme.md
2 hours ago
Also, the second picture is a video link with the correct URL.
3 hours ago
It's stunning. The video speaks for itself. Please scale this up, like way up back of a truckbed size. This would be delightful to see spinning and running IRL.
Then get a grant and make one as wide as a city street
4 hours ago
I can see this being applied to hubcaps in the future.
3 hours ago
Okay, that is genuinely amazing.
Love it, thank you for sharing and for being inspiring :-)
5 hours ago
Absolutely fantastic!
The video URL doesn't seem to be correct, through. ;)
5 hours ago
> Avoid use in operations.
Oops
2 hours ago
How do you get the flashing LED synced up to the spinning pinholes? Maybe the motor provides some positioning feedback so you just have to line it up once…
2 hours ago
eat it hdmi
3 hours ago
about the same idea as nipkow disk
nowadays when people don't want to go the rotating led bar way, which requires very high density led strips (hundreds of ~200-400 mil smd leds) and the accordingly complex control circuitry (basically an FPGA per bar + high speed bus, etc), they do nipkow disk but with individual leds instead of holes. this way you can get away with tens of leds while still having a reasonable sized picture and not that much bandwidth to drive it.
edit: another, less sophisticated take is for example
https://hackaday.io/project/191947-rotating-led-display/deta...
an hour ago
I mean if you squint hard enough, it's the same idea as a cathode ray tube. Each hole scans across the "screen" for the desired width, then the next hole down takes over, which does the same. Back in the day, you'd get an interrupt when the reset happened, and you could recalculate your sprite position before the next line got scanned.
Very cool seeing this implementation though. Congrats, OP!