Level shifting between c5515 ezDSP and Uno

Made another symbol in Eagle! This one is for I2C level shifting. Also edited SamTec’s MEC-1 pads to accomodate a key on Pin 21. Really happy that Spectrum Digital’s pin numbering is consistent, with pins 21 and 22 missing!

Screen Shot 2015-04-06 at 10.41.29 PM

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