BlueSteel54
Technical User
Could someone please explain why a hard drive has 4 wires in the power plug.
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What does the 4 wires in a HD power plug do?
- Thread starter BlueSteel54
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The why is to keep the small changes in current flow (therefore a voltage shift in the ground) in the motor circuits from getting reflected in the control circuits.
And although the Wikipedia article calls it a Molex connector the specifications for this on earlier drive manufacturer spec sheets are for an AMP connector (AMP Special Products--a TYCO subsidiary). Molex now provides a comparable product.
Ed Fair
Give the wrong symptoms, get the wrong solutions.
And although the Wikipedia article calls it a Molex connector the specifications for this on earlier drive manufacturer spec sheets are for an AMP connector (AMP Special Products--a TYCO subsidiary). Molex now provides a comparable product.
Ed Fair
Give the wrong symptoms, get the wrong solutions.
- Thread starter
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BlueSteel54
Technical User
Thanks you
So you are saying that the hard drive actually uses 2 differrent voltages. A 5v and a 12 v and that 1 black wire is the ground for the 5v and the other is the ground for the 12v. That the ground wires are isolated from each other.
So you are saying that the hard drive actually uses 2 differrent voltages. A 5v and a 12 v and that 1 black wire is the ground for the 5v and the other is the ground for the 12v. That the ground wires are isolated from each other.
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