2021-04-03 15:54:12 UTC
Here's a brain teaser (for me) that I'd like to hear opinions on.
I ran into this video this morning and I'm puzzled as to what may be going on.
After all, in modern day electronics, if you are using any sort of digital device you can only output a high/low so I wonder how the trailing led's in the video are "dimming" out rather than showing an abrupt on/off. If you watch this starting at :24 sec and stop it. you'll see what I mean.
I mean I know there are A/D inputs but is there such a thing as a digital to analog output? Maybe there is some capacitance on the output that is feeding the led causing the fade out?
It's a cool effect. Can't recall seeing anything like it.