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Thread: sproogy and hard disks

  1. 06-27-2002, 07:45 AM #1
    cheesyhoward
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    sproogy and hard disks

    I tested out me sproggy with just a quantum harddisk as the load which requires

    peak 5v @ 700mA and 12v @ 1,700mA
    normal +5v @ 600ma and +12v @800ma

    When i switch on the sproggy the hd just keeps clicking and wont spin up. Isnt the sproggy 2.7 meant to supply 2amps on the +12? What do i need to do to get the hd to work?
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  2. 06-27-2002, 07:55 AM #2
    Mastero
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    The problem is not your Sproggy its the input to your sproggy try to connect it to the car battery and see.. !

    Mastero
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  3. 06-27-2002, 07:56 AM #3
    cheesyhoward
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    tried that
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  4. 06-27-2002, 08:00 AM #4
    cheesyhoward
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    since my setup dont need -12v will disconnecting the capacitor and 78l05 give me a bit more juice on the +12?
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  5. 06-27-2002, 08:01 AM #5
    Mastero
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    Then i guess you will have to put a amp meter in between the hdd and see how many amps its pulling !

    Post the results here !
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  6. 06-27-2002, 08:32 AM #6
    cheesyhoward
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    dont think me multimeter is working correct coz it dont register any current and tried it on other stuff as well and i was measuring in series also
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  7. 06-30-2002, 06:25 AM #7
    Dima
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    Sproggy's PSU is giving 1.2A at 12V. I had exactly the same problem.My HD needed 2.5A for spin-up.I connected HD directly to the car's battery (using relay),this worked fine for me for a year,but now it's connected to 2 MAX1771 outputs which gives me about 3A,that's enough for HD.
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  8. 06-30-2002, 07:16 AM #8
    cheesyhoward
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    does using that chip allow you to crank your engine or do you have to switch off your car computer first?
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  9. 07-02-2002, 05:59 AM #9
    Dima
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    you can start the engine and it doesn't affect the HD.
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