<div>I have a question that came up at ther flying field yesterday.</div><div>The query was: What produces the arming tone and the cell count tones that are </div><div>audible when the battery is plugged in to an electric motor powered model?</div>
<div> </div><div>There were guys that were adament that the tones were produced by the current</div><div>surging through the motor.</div><div> </div><div>There was confusion due to the fact that no visible speaker could be observed.</div>
<div> </div><div>I felt that there had to be nano oscillator circuits in the esc working some kind of a</div><div>nano piezo circuit generating the required tones, but I really had no idea.</div><div> </div><div>Can somebody please clear up the confusion, ? anybody,? Peter???</div>
<div> </div><div>Thanks </div><div> </div><div>Georgie </div>