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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!

Member #455671

Member Since: July 19, 2013

Country: United States

  • Looking closely at the picture it appears the grounds are tied together and form a ground plane on the back side of the the board. So, they provide a common ground for whatever two circuits or boards you are translating levels between. Not hooking them up would cause the signals to float and give unreliable results.

No public wish lists :(