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How to make an HDD to Spin Constantly without to be connected to motherboard

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2X:
Hello,
there is way to make an HDD to spin constantly at full speed without to be connected to motherboard? The HDD motor if I don't make a mistake is step motor and needs pulses to rotate. There any circuit or kit (from ebay) that takes only DC voltage (like sata power connector) and makes the HDD to spin constantly at full speed without to be connected to motherboard?

DavidAlfa:
If you first connect it to a computer and disable AAM/APM to remove any kind of power saving feature, it might keep spinning with just applying power... not sure though!
What's the purpose of this? Making Persistence Of Vision LED clock?

2X:
I want to add a sandpaper on it in order to sand old electronis screwdrivers. I don't know if it works or this is stupid but I would like to try it.

Benta:

--- Quote from: 2X on June 12, 2022, 08:19:28 pm ---I want to add a sandpaper on it in order to sand old electronis screwdrivers. I don't know if it works or this is stupid but I would like to try it.

--- End quote ---

HDDs normally use PMSM for the spindle. I seriously doubt if the torque will be enough to sharpen a screwdriver.
Stepper motors were used in very old HDDs for head movement and were replaced with voice-coil head movement later.

Ian.M:
It will error and shut down when the heads fail to read the servo data.  You'd need to scrap the control board and connect the motor to a compatible sensorless BLDC motor controller, and as Benta points out there almost certainly wont be enough torque to be useful.

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