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SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

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.

No public wish lists :(