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SparkFun will be closing early at 3:30 Friday 5/27 and remain closed Monday for Memorial Day (5/30). Orders placed after 2pm MT on Friday (5/27) will process and ship out on Tuesday (5/31).

Member #459777

Member Since: August 6, 2013

Country: United States

  • Simply follow this tutorial: http://arduino.cc/en/Tutorial/Knock or this one: http://www.arduino.cc/en/Tutorial/KnockSensor

    they use simple piezo sounders as sensors, but it works in the exact same way. Just experiment a little on the resistors, I think I used 100K or so.

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