Inerface the reader head of a CD Rom.

B

Ben

Guest
Hi,

I want to be able to interface the laser, sled, tracking and focus of a CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and tracking
coils, maotor of the sled and the laser.

Thankyou
 
Ben wrote:
Hi,

I want to be able to interface the laser, sled, tracking and focus of a CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Click to expand...
Why don't you get another one and this time pay attention BEFORE
you take it apart??

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
 
Because I want to interface it with a PIC and I was just wanting to know if
anyone knew what voltages it runs at, as I couldn't tell because it is hard
to trace the connections back if you don't know what the ICs do.

I can put it back together, it's not like a hit it with a hammer.

"R. Steve Walz" <rstevew@armory.com> wrote in message
news:4060D1FB.7EEE@armory.com...
Ben wrote:

Hi,

I want to be able to interface the laser, sled, tracking and focus of a
CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and
tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Why don't you get another one and this time pay attention BEFORE
you take it apart??

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
The S/W involved in getting the laser to follow the track on the CD must be
horribly complex. You probably need to know all sorts of wacky parameters
like the inertia of the sled - My guess is that if you don't work for a
drive manufacturer or have a source of inside information it won't be
possible. Drive manufacturers have big teams of people to do this stuff.


"Ben" <insurrector.remme@iinet.remme.net.au> wrote in message
news:40616ce4$0$16595$5a62ac22@freenews.iinet.net.au...
Because I want to interface it with a PIC and I was just wanting to know
if
anyone knew what voltages it runs at, as I couldn't tell because it is
hard
to trace the connections back if you don't know what the ICs do.

I can put it back together, it's not like a hit it with a hammer.

"R. Steve Walz" <rstevew@armory.com> wrote in message
news:4060D1FB.7EEE@armory.com...
Ben wrote:

Hi,

I want to be able to interface the laser, sled, tracking and focus of
a
CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and
tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Why don't you get another one and this time pay attention BEFORE
you take it apart??

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
R. Steve Walz says in da message <4060D1FB.7EEE@armory.com> in da phuck'n group
sci.electronics.misc:
Ben wrote:

Hi,

I want to be able to interface the laser, sled, tracking and focus of a CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Why don't you get another one and this time pay attention BEFORE
you take it apart??
Click to expand...
Discovering the interface data may almost be impossible, because many CD ROM
drive manufacturers use custom VLSI chips.

--
_____ ___ Chaos MasterŽ
| | Posting from Brazil
| | MSN: wizard_of_yendor at hotmail.com
___|_____| irc.brasnet.org #XLinuxNews #POA
 
Ben wrote:
Because I want to interface it with a PIC and I was just wanting to know if
anyone knew what voltages it runs at, as I couldn't tell because it is hard
to trace the connections back if you don't know what the ICs do.

I can put it back together, it's not like a hit it with a hammer.
-----------------
Click to expand...
My suggestion is, that if you have it intact, just test the voltages
and currents being supplied to it, and control them with your own
inputs by cutting a few traces and tapping in your own controls;
yields minimal circuit hijacking and your work is done!

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

--
Why don't you get another one and this time pay attention BEFORE
you take it apart??

-Steve
Click to expand...
 
Chaos Master wrote:
R. Steve Walz says in da message <4060D1FB.7EEE@armory.com> in da phuck'n group
sci.electronics.misc:
Ben wrote:

Hi,

I want to be able to interface the laser, sled, tracking and focus of a CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Why don't you get another one and this time pay attention BEFORE
you take it apart??

Discovering the interface data may almost be impossible, because many CD ROM
drive manufacturers use custom VLSI chips.
_____ ___ Chaos MasterŽ
-------------------------------------------
Click to expand...
The actuator voltages are available, as is the head output.
That's what he wants.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
 
Yeah, thanks.

I found some other stuff for it aswell. Seems they are really sensitive and
i might have to just buy a discrete laser for what I want to do.

Thanks anyway.
"R. Steve Walz" <rstevew@armory.com> wrote in message
news:40629FD5.742@armory.com...
Chaos Master wrote:

R. Steve Walz says in da message <4060D1FB.7EEE@armory.com> in da
phuck'n group
sci.electronics.misc:
Ben wrote:

Hi,

I want to be able to interface the laser, sled, tracking and focus
of a CD
Rom I have pulled apart. Does anyone know what inputs the laser
takes,
analogue/digital, and the maximum volatge/current for the focus and
tracking
coils, maotor of the sled and the laser.

Thankyou
--------------
Why don't you get another one and this time pay attention BEFORE
you take it apart??

Discovering the interface data may almost be impossible, because many CD
ROM
drive manufacturers use custom VLSI chips.
_____ ___ Chaos MasterŽ
-------------------------------------------
The actuator voltages are available, as is the head output.
That's what he wants.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
"Ben" <insurrector.remme@iinet.remme.net.au> wrote in message
news:4060cadd$0$16592$5a62ac22@freenews.iinet.net.au...
Hi,

I want to be able to interface the laser, sled, tracking and focus of a CD
Rom I have pulled apart. Does anyone know what inputs the laser takes,
analogue/digital, and the maximum volatge/current for the focus and
tracking
coils, maotor of the sled and the laser.

Thankyou


Can you tell us to what end you want to do with this. The laser is very low
Click to expand...
power and is infrared so you wont be able to see it like a laser pointer.
Curious..
 
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