Spectroid app as tachometer.

[vroemm]

Hi Folks.

Did you know you can use the spectroid app on a android smartphone as a tachometer.

If you put a little piece of tape as a flag on the spindle, the sound is measured and the frequency in hertz is displayed as a number in the chart in spectroid.

Sometimes you have to change the settings of spectroid to display more the one frequency as a number.

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