this post was submitted on 11 Jul 2023
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The board is built into the motor and should also add flyback protection, that's why I'm not sure if I need the diode. Give it juice and it spins.
The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won't need it but it doesn't do any harm either.
Kind of like an inductor?
That's what I figured as well, there's some sort of board under the top of the housing. I'm going to leave the diode in.
I appreciate the advice!