I have a couple of questions:

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I have a couple of questions:

  1. Is there a data pin that is quicker than others? or one that is better to use? I’m using a Teensy 3.1
  2. How fast can a Teensy 3.1 go? I have it running a 60 Neopixel ring with a simple FirstLight-esque sketch (without the delay) and my 120fps iPhone is showing about 4 of them lighting up at once — so it’s too fast for that!

James

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  1. This only matters when you’re using chipsets that are clock/data line paired, because then some of the pins will use hardware accelerated SPI … however, since you’re saying you use neopixels, it doesn’t matter.

  2. For driving the leds, it’s less about how fast the processor is, and more how long it takes to write led data. In the case of the neopixel ring, it takes 30µs per pixel, and you’ve got 60 of them - so that’s 1.8ms per frame, and it sounds like you’re seeing ~480fps (maybe even a bit higher than that)

(I know, i know, I still need to put in the rate limiter to keep WS2811 frames from going above 400fps)

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Thanks for the answers Daniel — really appreciate it.