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Glitch with Neopixel Matrix and Spark.io Core with a Spark Shield Shield

While marrying the Neopixel Matrix to a spark.io Sheild Shield, I couldn't seem to get the matrix to respond.

Through testing with other Arduinos (worked), I tried it un-married and with the data pin coming from digital pin 2 instead of the hardwired digital pin 6 -- and it worked.

I don't know if I have a bum Shield Shield or if there's something in its hardware that doesn't play well with pin 6. In the end, I physically trimmed the #6 header pin off the matrix and wired pin 2 to pin 6.


Details of the project that lead to this issue are on johnkeefe.net

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