Need a Fresh Eye on a Schematic

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Hi, I am pretty useless for reviewing your schematic, but it would be much easier if there was a PDF or JPEG or something not an Eagle file. Thanks!
 
Sorry. My bad.

teensy_protocol_xl8r_3_6.jpg
 
is that the normal way you present a schematic? i'm curious because it is the first time i have ever seen one with black background. and i've been looking at schematics for 45 years. also, it would be nice if you could put a .pdf on a file sharing site that was large enough to allow it to be expanded and maintain quality image.
 
That image is under 100Kb and limit is 1MB for forum display. I looked and it is a bit grainy to follow and read.

Am I reading right that the UARTS are bought out with a GND and 5V pin pair? Perhaps that is intended. MK66 is not 5V tolerant - that seems asking for trouble when anything connected should be 3V3 and will be seeing TTL at that level.

Not sure how much detail you can get - but did you refer to the PJRC Posted K66 reference board posted on OSHPark? It offers a zip of the gerbers.
 
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