Grumpy_Mike:
Interesting the comment on that first video was:-That shows how much work and skill is needed making something like this.
Not curved like this. You can get a flexible LED matrix based on a similar addressable LED, expensive but could cut down on the work.
Yes I have see this matrix. Very expensive
I found it cheaper. A friend uses this works properly
But my concern is what battery he uses because he says he has more than 700 LEDs.
Then 42 Amps
Maybe He use some resistor or capacitor. He don't give details