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cdrom drive as stand-alone cd player?

Discussion in 'Electronic Basics' started by Jan Wagner, Nov 2, 2005.

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  1. Jan Wagner

    Jan Wagner Guest

    Hi,

    anyone know how to make a normal PC CDROM drive play a standard audio CD
    (CD-DA), when only a power supply and no IDE cable is connected?

    I've tried the simplest
    http://www.hardwaresecrets.com/printpage/71
    on three cdrom drives that I happened to get. Power is taken from PC,
    for now. However it doesn't work, no automatic playback.

    As usual the cdroms have only an eject button, volume control, and a
    headphone jack.

    Is there some easy way to make it work?

    Or do the current drives require an ATAPI command to start playing?

    Reason: I need a simple portable/stand-alone (for demos) serial audio
    source (MCLK, SCLK, SDATA, LRCLK) with 44.1kHz 16bit stereo to test and
    debug a prototype of another project. Old PC cdrom drives are abundant
    and free!!, whereas portable cd players are not ;-))

    thanks,
    - Jan
     
  2. Spajky

    Spajky Guest

    http://private.addcom.de/KeithWilson/Projects/mucop.htm
     
  3. GotCoffee

    GotCoffee Guest

    How about getting a cheap CD player from Wal-Mart? I bought a personal
    cd player from Wal-Mart for my kid the other day for just under $10.
    Probably only a couple $'s more than what you would spend on parts to
    get a computer CD drive to work.
     
  4. Impmon

    Impmon Guest

    Ah but once the interface are built to make CD-ROM work as stand alone
    CD player, that interface could be transferred to another CD-ROM when
    one dies. No cost there as old CD-ROM often turn up for free anyway.
     
  5. I got my portable CD player back in the spring for a dollar at a garage
    sale. And that's likely to become more common as people abandon their
    portable CD players for MP3 players.

    But I thought the issue was you wanted the output of the CDROM player
    in digital format, for some reason? That's the real determining factor.

    But since CD-ROM drives are common and do turn up for free, then
    all you have to do is keep watching until you find one that will
    play with no interface. That can go from one taht has a single button
    but the button serves a dual function, to those that have multiple buttons
    that allow more control than play and stop.

    Michael
     
  6. Sjouke Burry

    Sjouke Burry Guest

    Sorry, I have such a cd (seperate button to start/step an audio cd.,
    but it wil not play,when not connected to an IDE cable.
    Pity because it fitted nicely inside a Sun diskdrive case).

    S Burry
     
  7. Jasen Betts

    Jasen Betts Guest

    put the cd in and press play.

    pick a cd-rom drive with a play button.

    I got an old self-contained CD-rom unit (I think it once lived under a
    classic mac), it cost me $3. I removed the old scsi cd-rom drive (it had
    no play button...) and replaced it with a surplus IDE drive
    (with a play button, headphone jack, volume control etc) fitted RCA sockets
    to the back and connected them to the analogue out on back of the the cdrom
    drive and stuck it next to my amplifier and hooked it up, it works great.

    also it'll play any media like CDR, and CDRW (not just factory CDs.)

    If it doesn't need to be tidy you can hook your drive up to an old PC
    power supply.

    Bye.
    Jasen
     
  8. Jan Wagner

    Jan Wagner Guest

    Thanks everyone!

    I did now manage to find a Panasonic(?) CD-R one which has three
    play/forward, stop and eject buttons, but this has the same problem
    you said, refuses to play without IDE&PC. Maybe a different drive
    will work.

    I also had more in depth look (IC chips+datasheets and signal
    traces) at the other "buttonless" drives. There really doesn't seem
    to be any good way to start audio CD playback automatically, except
    for replacing the firmware, or writing an "adapter" like in Spajky's
    link (thanks!).

    MuCoP uses PIC16xxx which is a horrendous architecture (IMHO :), and
    quite an expensive series anyway. But, at least the ATA commands
    looked amazingly simple. Maybe I'll cook something up for the
    inexpensive AT89C52 and ATA in 8-bit mode, and put it on the net
    later on... unless a portable cd player turns up from somewhere...

    Thanks again...

    - Jan
     
  9. Sjouke Burry

    Sjouke Burry Guest

    Sorry, does not work (even with a unit with play button)
    it just chewes on the CD a bit ,then quits.

    Burry.
     
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