It is that time again! SparkFun Electronics will be closed Friday, January 13th for our annual inventory day. Please keep in mind that any orders placed after 2PM (Mountain Time) on Thursday, January 12th will not ship or be prepared for local pickup until we open for normal operations on Monday, January 16th. In addition, tours will resume on Friday, January 20th. Thank you for your patience!


Member Since: January 9, 2010

Country: United States

  • I bought the “Weather meter”.
    The datasheet say for the anemoter:
    The cup-type anemometer measures wind speed by closing a contact as a magnet moves past a switch.
    A wind speed of 1.492 MPH (2.4 km/h) causes the switch to close once per second.
    But I do not understand, I tested the anemometer and I have 2 contacts per revolution.
    Can you confirm the number of contacts per revolution ?

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