cd pickup advise

[Yoong Ping Lim]

Hi,

Wonder if you can kindly offer me some information on CD pickup with
regards to:

1. pinout

2. the structure, especially optics ( I have observed that the pickup
structure differs from one model to another, is it possible for you
to list or provide source of optics information of the cd pickup along
with the product model, etc).

Thank you very much for your aid rendered and time. I have read
through sam laser faq but it is too generalised.

Yours sincerely,
Yoong Ping, Lim

 

[jim dorey]

Hi,

Wonder if you can kindly offer me some information on CD pickup with
regards to:

1. pinout

2. the structure, especially optics ( I have observed that the pickup
structure differs from one model to another, is it possible for you
to list or provide source of optics information of the cd pickup along
with the product model, etc).

Thank you very much for your aid rendered and time. I have read
through sam laser faq but it is too generalised.

Yours sincerely,
Yoong Ping, Lim

it's a very generalised subject, every manufacturer does it differently,
so it's better if you focus on a particular model.

 

[mikelim]

which one do you suggest that i follow. can you tell me one that you
are experienced with? so that i can turn to you for advice. thank you.

 

[jim dorey]

which one do you suggest that i follow. can you tell me one that you
are experienced with? so that i can turn to you for advice. thank you.

well, most are simple mechanisms, but you have to find the pinouts pretty
much by yourself, there may be someone to help if you do ask, but which do
you have? i picked one up from walmart, cost 10 bucks, worked, ripped it
apart, probed it, then connected it to a yamaha mp3 chip. there's likely
to be a stepper motor interface and some way of telling where the read
head is, it's rather simple. www.bitscope.com has schematics, for free,
of the older versions of their hardware, it should do what you want, or at
least give you an idea of what you need, a logic analyser.

 

[mikelim]

are you familiar with hul7211

i believe it is a panasonic hologram unit.

http://www.semicon.panasonic.co.jp/ds/e-index.html
but they only have hul7001.

are they similar? cant be right? where can i get a datasheet of the
hul7211

 

[jim dorey]

are you familiar with hul7211

i believe it is a panasonic hologram unit.

http://www.semicon.panasonic.co.jp/ds/e-index.html
but they only have hul7001.

are they similar? cant be right? where can i get a datasheet of the
hul7211

okee, i'm ready to answer, but only cause i'm about to fall asleep, maybe
it's a different version with a slightly diferent packagine method. could
be the signals are the same, timing the same, but maybe even the colour
would give it a different number, look in the ordering section of the
datasheet for the one you can find, it may tell you.