If you use a raspberry Pi Pico processor PR2040 then the programmable I/O can be made into a state machine and can run sending data into the WS2812 without using any CPU time at all.
Mind you these are not that easy to program.
If you use a raspberry Pi Pico processor PR2040 then the programmable I/O can be made into a state machine and can run sending data into the WS2812 without using any CPU time at all.
Mind you these are not that easy to program.