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Old 10-07-2019, 10:43 AM
jack01 is online now
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Every motor when it’s spinning generates voltage, even if the motor is spinning under its own power. It’s called back EMF. That’s actually what the KV rating of a brushless motor really is. A 2,100KV motor makes 2.1 volts of back EMF at 1,000 rpm, although our common usage of 1,000 rpm at 2.1 volts works too.

The motor generates that same voltage when it’s spun mechanically too. In this case, it made enough to light up an LED. Every now and then you can see guys moving a surface really quickly and the other servos jump. It doesn’t hurt anything.
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Last edited by jack01; 10-07-2019 at 10:48 AM.
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Old 10-07-2019, 12:11 PM
rooman is offline
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They're get'n lower mate.....
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United States, TX, Houston
Joined Nov 2006
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Not every motor -
One must be of specific design ...... there are many
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