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Thread: IDE Question / CD Drive Open/Close

  1. #1
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    IDE Question / CD Drive Open/Close

    I found some documentation on the IDE pinprint but it didn't really have the answer i'm looking for.

    When utilizing WMP, Windows, or another Music Player to open/close a CD drive via Software/OS is there a specific wire number that is being triggered/grounded to tell the drive to open/close?

    The reason I ask is was thinking of having two CD drives in my IASCA SQ car next year. One is a Plextor 716AL for DVD, etc. and a Plextor Premium2 which will be behind a panel (or maybe just one drive behind a panel i'm not sure yet). The panel is rigged with a servo to open/close. If it's a certain wire/pin then I can just interrupt it with a relay/microcontroller to have the panel open first then the drive eject or something along those lines (after a very short delay). Closing is of course the opposite.

    Thanks!

  2. #2
    DIGItonium
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    How about rigging directly to the solder pads of the eject button?

  3. #3
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    Wiredwrx's Avatar
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    Quote Originally Posted by schreibers View Post
    I found some documentation on the IDE pinprint but it didn't really have the answer i'm looking for.

    When utilizing WMP, Windows, or another Music Player to open/close a CD drive via Software/OS is there a specific wire number that is being triggered/grounded to tell the drive to open/close?

    The reason I ask is was thinking of having two CD drives in my IASCA SQ car next year. One is a Plextor 716AL for DVD, etc. and a Plextor Premium2 which will be behind a panel (or maybe just one drive behind a panel i'm not sure yet). The panel is rigged with a servo to open/close. If it's a certain wire/pin then I can just interrupt it with a relay/microcontroller to have the panel open first then the drive eject or something along those lines (after a very short delay). Closing is of course the opposite.

    Thanks!

    There is probably no postivie trigger for this, carried on a line. It is mostly likely sent as a data byte or bit, and the CD knows to eject or load the cd.

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

  4. #4
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    Quote Originally Posted by Wiredwrx View Post
    There is probably no postivie trigger for this, carried on a line. It is mostly likely sent as a data byte or bit, and the CD knows to eject or load the cd. l
    That's what I was afraid of.

    Still doable I just thought it would be cool to not have an physical eject 'button' to start the process of a cover panel opening then drive opening and vice versa. Working with two drives tho might get tricky as i'd only want one eject 'button' but the process is different for each drive.

    Thanks guys!

  5. #5
    DIGItonium
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    You can send a pulse to trigger the physical eject button. You will need to measure the impedance and voltages on each side of the eject button to determine the course of action. Check the change in voltage when you press the eject button. Your goal will be to raise or lower that voltage to trigger the eject function.

    You can use a small FET or transistor to accept the pulse and drive the eject pin high/low depending on the approach.

    Trial and error!

  6. #6
    Constant Bitrate Vineet Singh's Avatar
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    What about this, a hotkey mapped to it/them, via a USB gamepad button that is pressed as the cover or what not, opens?

    (CD Ejector program - freeware for lite version)
    http://www.nesoft.org/antilostcd.shtml

    (Hotkey assigning program - gnu)
    http://www.autohotkey.com/

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  7. #7
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    You could probably pulse a line on the LPT port (if the system has one) whenever the drive is soft-ejected to open the panel. If the panel opens too slow, you could write a simple program to kick the panel open, then soft-eject the disc tray.

    Also, there's the cheap OEM way, just have the panel be pushed out of the way by the CD tray itself. You might need to create a ramp on the bottom to keep the panel from catching on the CD tray.

  8. #8
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    What about wireing a relay in to the tray drive motor, so that when the drive motor kicks in to eject the CD tray the relay trggers and the hidden panel opens. That way whether by soft or hard eject, the panel still opens.

    Just a thought.

  9. #9
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    Sorry to raise up an old thread but maybe someone can help me..
    I want to use my eject button from my headunit to eject my cd. I mounted the slotload dvd drive in my headunit now eject is a problem.. there are 4 solder pads for the dvdrom switch and they are small attached to a wax board with thin wax cable

    the headunit has normal solder joints.

    Any special way or tips any one have for soldering it.

    Could the headunit short out my dvdrom

    Any advice is welcome.
    KIAs can have car pcs too..

  10. #10
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    Okay since no replies i am adding pics maybe that will give someone a better idea of what i mean.




    KIAs can have car pcs too..

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