Pixelmatix has made a new SmartLED Shield capable of driving large 128×64 LED panels at 240 Hz refresh & 36 bit color!

This shield is currently being made available on Crowd Supply.

The SmartMatrix library offers amazing features. 36 and 48 bit color can be used, or 24 bit color can be automatically expanded with gamma curves for color correction, good contrast, smooth gradients.  Larger 128×128 HUB75 LED panels can also be used at lower refresh rates.

Much of this is made possible by Eric Eason’s work with FlexIO and DMA on Teensy 4.

Complete details & discussion are on this forum thread and the Crowd Supply project page.