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Grey coding ensures that just one bit changes at a time. The example he uses to show the importance of this is when binary code transitions from 7 (0b0111) to 8 (0b1000).

Good grief. Ever since I published last week's “How To” on Gray Codes, emails have been flooding in containing all kinds of interesting tidbits of information. For example, one reader informed me that ...

Grey coding ensures that just one bit changes at a time. The example he uses to show the importance of this is when binary code transitions from 7 (0b0111) to 8 (0b1000).