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Thread: HDD motor pinout?...

  1. #1
    Variable Bitrate Sh0cker's Avatar
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    HDD motor pinout?...

    To make long story short,
    hhd that didnt want to do whats supposed to be done, and its consequences:


    anyway, do you know how to power the hdd motor to make those disks spin?
    there are 3 pins, couldnt findy any info about them, maybe you know how to do so


    thx
    Danny.

    "If today was perfect, there would be no need for tomorrow."
    My Car Project® ‹== !10.4" Allbrite, touchscreen, epia, 150opus, gps, wireless, sony remote [old] 128x64 Crystalfontz +double din [new]

  2. #2
    Maximum Bitrate binary.h4x's Avatar
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    i would just use the guess and check method, also if u just apply power, it should spin without needing a signal over the ide interface
    2007 Honda Fit Sport 1.5L SOHC-VTEC

  3. #3
    Newbie volvo9's Avatar
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    Just do as binary.h4x says and guess!, it's already broken!

    BE CAREFUL THOUGH!!! I took the top off a broken 20gb hard disk and was spinning the platters and when i got bored and decided to trash it I bent the platters down and SNAP! the damn things where GLASS! it exploded and almost gave me a heart attack at 1am! There where shards of glass everywhere, in my hair, clothes, stuck in my hand, and all over the carpet.

    I had pulled apart a few other hard drives and the platters in them where some sort of metal, this one with the glass sounded and felt like metal till it blew up on me.

    Have fun!

  4. #4
    Newbie
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    The motors in hardrives are brushless DC motors.

    You cannot just apply power and get them to work.

    Power has to be pulsed in the right sequence at the right time to get the thing to spin. This requires a motor controller. The motor controller in a hardrisk is built on to the PCB on the bottom of the drive.

    With modern drive design the motor controller is often built into a single large chip that makes up all of the drive's logic circuits.


    volvo9: Yes, as you found out most hardrives today use glass for their platters. Glass allows for a smoother surface than metal thus allowing data density to increase. Its extremely dangerous to poke things at these types of platters while they are spinning! Of course you already found this out

  5. #5
    Variable Bitrate Sh0cker's Avatar
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    i was supplying a 12V -didnt even move ;(
    all three pins seem to have the same polarity b/c i saw arcing while powering it
    .
    anyway, ill play with it tomorrow...
    Danny.

    "If today was perfect, there would be no need for tomorrow."
    My Car Project® ‹== !10.4" Allbrite, touchscreen, epia, 150opus, gps, wireless, sony remote [old] 128x64 Crystalfontz +double din [new]

  6. #6
    Low Bitrate killerfishes's Avatar
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    as stevewm posted. the moter is a brushless stepper motor, it would be hard for you to get it to spin. http://www.atarimagazines.com/v5n8/S...otControl.html will tell you more on how they work.
    now working on my Dodge Dak
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