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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 #6412

Member Since: July 21, 2006

Country: United States

  • No, RS-232 is bipolar, with both negative and positive levels with respect to ground to encode different states of the RS-232 data. The logic levels are unipolar, with positive voltages near 5/3.3/etc. volts for “1” and near zero volts to encode a “0” level.

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