[Laser] Laser on CDs XE2AT

Tue, 17 Feb 2004 11:29:55 -0500

If the chip you saw is on the moving "head" then it has several detectors
for tracking and reading of the CD. It probably does not have an amp. Give
it a good look with a magnififer. Also trace the connections, find the
ground and power then try it.
walt

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of [email protected]
Sent: Tuesday, February 17, 2004 11:02 AM
To: [email protected]
Subject: Re: [Laser] Laser on CDs XE2AT

In a message dated 2/17/04 3:54:18 PM GMT Standard Time, [email protected]
writes:

> GM all I have a very old CD player and I saw a chip like OP210 , the
> diference is it have 10 pins( but just 8 used ), somebodie know about it?
> I can use it for a Laser receiver ?
>  I can use the G0MRF diagram like the used for Op210 ?
> Thanks in advance
> Al
> XE2AT
>   and the Laser used on CD how many mw have ?
>
>

If it's the Burr Brown OPT210, then it is a good choice for a front end.  My
opt210 can detect a laser signal that you can't see and has given good 5 x 7
speech and 599 CW over 76km.

There are data sheets available.  There is also circuit for a receiver on my
web site. If you decide to build that, drop me a line as we've managed to
extract another 6dB+ of sensitivity since that circuit was drawn

For later CD recorders or DVDs you'll also have a nice high power laser
diode. However your early version is probably a couple of mW of I.R.

73

David

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