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Thread: How many Watts do 2 full height FDD use?

  1. #1
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    Default How many Watts do 2 full height FDD use?

    How many Watts do 2 full height FDD use?

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    Which FDD models? Usually bitsavers will have data sheets from the manufacturer.

    Note that most drives draw a peak amount of current when starting the disk rotating.

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    Quote Originally Posted by Chuck(G) View Post
    Which FDD models? Usually bitsavers will have data sheets from the manufacturer.

    Note that most drives draw a peak amount of current when starting the disk rotating.
    Tandon i think

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    Models?

    e.g. TM-100, PDF page 8 says:

    12VDC @ 900 ma. (max) = 10.8W
    5VDC @ 600 ma (max) = 3W, so one drive = 13.8W maximum (peak).

    Since PCs typically run only a single drive at a time, the consumption for two will still be less than 15W maximum.

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    The Tandon TM-100 seems to have the exact same power requirements as the Shugart drives. Rounding up, if both drives ran at the same time, the combined power consumption would be less than 30 watts. That includes the 5% extra voltage the spec permits; i.e. 900 millamps at 12.6 volts and 600 milliamps at 5.25 volts.

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    Quote Originally Posted by Chuck(G) View Post
    Models?

    e.g. TM-100, PDF page 8 says:

    12VDC @ 900 ma. (max) = 10.8W
    5VDC @ 600 ma (max) = 3W, so one drive = 13.8W maximum (peak).

    Since PCs typically run only a single drive at a time, the consumption for two will still be less than 15W maximum.
    Tm-100

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    Few programs, however, (with the exception of a few from modesty forbids) run more than one drive at a time on the PC.

  8. #8

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    Forget the modesty, it's not relevant, inquiring minds want to know. Tell us now.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

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    Quote Originally Posted by Stone View Post
    Forget the modesty, it's not relevant, inquiring minds want to know. Tell us now.
    What?

  10. #10
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    CopyQM, FormatQM--run both (or up to 11) drive motors at the same time. Insert a disk to copy/format, remove when done, insert another. Program moves to the next ready drive automatically.

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