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Member #387788

Member Since: December 9, 2012

Country: United States

  • I seem to be having trouble getting a valid frequency output from this device. I have it breadboarded and interfaced with an Uno Rev 3, 5V power, capacitor to decouple, GND, and input to Pin 2. I am using an interrupt routine to derive the frequency (per web examples). However, the values I get are in the 100 to 200 KHz range in ambient room light. When I move my desk lamp within 1 foot, the Arduino output locks up until I move the light away. Frequency readings when I do this exceed 300 KHz. Help! Is this an issue with the interrupt routine?

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