Measuring Audio Frequency on scope

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what is the max frequency you can measure. I want to measure the frequency of my anti dog bark machine

michaelcostello
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did you program the sensor using Arduino ide software or did you just connect it directly to the oscilloscope? also, I want to know the connection of the sensor from the oscilloscope, are the probes of the oscilloscope connected to Vcc and GND of the sensor? thanks!

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