What pixels can I control with an 8 MHz Arduino (pro mini)? I’m thinking that a clocked pixel like the 2801 or 8806, but none of the self timed ones like the 2811 or 180x, right?
Or can the library cope with those latter while running at 8MHz? (I need to use 3.3v peripherals in a small/cheap package like an Arduino Pro Mini or similar, wanted to avoid needing an outboard regulator).
Mark and I have shown driving the 2811/12 and the tm180x off of 8Mhz versions of the Trinket and Gemma - so, with RC5, you should in theory be able to run on the 3.3v pro mini. The one downside is it doesn’t have the inline brightness scaling support at the moment…
One thing I found when using 3.3v components, however, you have to be feeding 5v into the leds, if you’re feeding 5.25v, then the led chips lose the ability to reliably differentiate between high and low signals on the data line.
Cool that it can work at 8Mhz - and I can easily do without the inline scaling.
Good tip about the pixel supply voltage when driving data from 3.3v. I was thinking to also drive some 12v pixel strings, which presumably internally regulate down to about 5v for the logic, outside of our control. So I guess some testing is all we can do.
I’ll get RC5, thanks!