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A small DC motor working and moving a disc. When device/motor is powered off, a hacker with a strong magnet came and rotated the motor; without touching the motor, just moving the magnet near the motor is sufficient to cause the motor-nucleus to rotate, and hence the shaft rotated and the disc. A friend told me this happens also with DC stepper motors, but not sure (Currently, no stepper motors available to test.)

Can you suggest a measure/solution to prevent magnet to rotate a motor?

schroeder
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mutucy
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  • This has nothing to do with security. This is a pure electrical question. The "hacker" in the scenario is incidental. – schroeder Jan 12 '21 at 11:42
  • You need a latch that stops the movement of motor. Use a mechanical key that controls the position of latch. That way vault won't be open by external magnets. – defalt Jan 12 '21 at 14:04

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