Charles Lakins created this shield for Teensy 3.x which can control addressable RGB LEDs (WS28xx):

The shield also enables data logging of  Smart Port Sensors: FrSky S-Port telemetry library.

Video of the shield controlling RGB LEDs:

3D-printed Neopixel Triplet holds WS2812B modules connected with 6-pin silicone wire:

irun4fundotca has shared the board on OSH Park:

Teensy v3.1 – S.Port & WS28xx Led Shield