DIY CD drive based on a computer CDROM

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#582
pinkfloyd7777 said:
I have been reading these posts the last few days and I have some questions.

What are you using for a DAC? And what code are you using to program the chips?

Thanks, probably more questions to come
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Here My DAC...
CS8414 + AD1852 + OPA134
 

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#586
Re: MCLL VFD

davesaudio said:
MCLL,
That must be a HD44780 compatible VFD?
or did you rewrite the code?
D
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Yes, HD44780 compatible VFD from Noritake-itron. In Hardware Pin assignment, just disconnect pin3. In coding, It's too mush flash & blink when playing, I was rewrite complete.

😀
 

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#588
Rockna

Variac said:
That Rockna-line kit seems to do the job!
Has anyone else had good dealings with them?
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I have had a CDRom Controller and a DAC on order from them for several months now. The reason for the delay was said to be unavailability of crystals for the DAC.Communicationis sporadic, but supposedly they are in the post now....we shall see.
 
#590
metaxus said:
I emailed them 2 months ago to order a CD-Rom controller kit (with the VFD), and never got a response.

🙁

I think I might have to look at another option.
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I would recommend you look for another source also. I still do not have my CDRom Controller or DAC kits after many months, and email communication is very sporadic. They promised they were shipping about a month ago.....still not here.

Robert
 
#591
We have been moving for some time but now we're through and everything is back to normal. I apologize to all for the delays caused by the fact.
Robert, please check your mail.
Metaxus, I don't know the reason, but your request never arrived to me.
 
#592
Lupulroz said:
We have been moving for some time but now we're through and everything is back to normal. I apologize to all for the delays caused by the fact.
Robert, please check your mail.
Metaxus, I don't know the reason, but your request never arrived to me.
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Thank you for the update! I am still anxiously waiting for these kits so I can proceed with my project.

Is Lupulroz and Nucu the same person?

Robert
 
#593
Rockna Kits

Lupulroz said:
We have been moving for some time but now we're through and everything is back to normal. I apologize to all for the delays caused by the fact.
Robert, please check your mail.
to me.
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My CDRom Controller and DAC-1 kits finally arrived in good shape....thanks. I had a few questions about power requirements for the boards and was promptly answered by direct email. I'm looking forward to implementing this project now.

Robert
 
#595
CDRom Controller

rabstg said:
I guess I missed something, because I never saw a complete solution come out of this thread...

Where did you get your kit and do you by chance have a link?
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My CDRom controller came as a 'kit' from Rockna in Romania:

http://www.rockna-line.com/

The kit is actually just the pcb, fully populated, and the display. No cables or transformers are included. No documentation came with the package, but schematics and some decent information is on their web site. There is a PSU on board, so all you need is a transformer or two to power it, and it outputs power for the CDRom. In addition to the mini push buttons on the board, it is supposed to operate from a Philips Standard RC5 protocol IR remote control.

I have not hooked it up yet.....so can't give you any feedback on its operation. It took a long time to get.....apparently they were moving locations. They have responded quickly to my questions once the kits arrived here.
 
#596
This is remarkably similar to something I was thinking about just now.

Have any of you guys seen THIS?

An externally hosted image should be here but it was not working when we last tested it.


I've been thinking about the possibility of recreating something similar at home, maybe using the transport from normal CD drive to carry the read head.

The transport wouldn't span a record on it's own, but unless the record was one long continuous track it wouldn't need to. The transport could be mounted on a translational stage with poorer accuracy.

You play the first track on the record, the translational stage is sitting at the beginning and the transport moves across. You then want to jump to another track. The transport rehomes back to 0 and the translational stage moves it out to the start of the next track. Transport scans, finishes, rehomes, stage moves to next track and so on.

The minimum retail they've recommended on their LP player is $15k. So I'm sure there's some room for expenditure before you even approach that with a DIY system. They say it cost them $21M in R&D to produce.

A normal CD drive already has height correction and some level of track tracing, leaving the read beams for the DIY'er to implement.

Not easy, but not impossible.
 
#598
karma said:
could you not mod out a old laser disk player?. there the same size as the lp and the tracking is allready there.

would be nice if it worked😉
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Nice idea.

How much could you get on the LDs MB wise?

The LD would definitly provide an easier transport and mechanical solution.

Just leaves fixing the tracking for a record groove and adding the read beams.

Perhaps the designers of the Laser Player got the idea from the LaserDisc.

I thought it was an interesting idea, a nice blend between LPs and digital. I've just started buying LPs and looking at the idea of making my own table in the future. I have about 50 - 100kg of lead in the back garden. 🙂

With a stylus you have to think about the vinyl and tip wearing down over time. The laser method would be great since you could replay records hundreds of times over with zero degredation.

But $15k... the whole point of making my own turntable was to have some fun and save some cash. About the only thing different in the Laser Player is the read head, and a lot of that could be replaced with a standard CD transport.

I think I found the player while I was looking around at tonearms. Particularly linear tonearms, which work in an almost identical manner.

Seems like an excellent project for microprocessor guys.

Thought that maybe you could implement the read beams in a manner similar to the laser listening devices I was reading about recently, they hit the reflective surface with a beam and then rely on the changes in phase interactions as the surface moves to alter the total beam amplitude arriving at the detector. I think the commercial version scans the beams across the groove walls.

Checked the bay, old LD players are literally bin material price wise. There's a pair on there for 70 pence at the moment. 😀
 
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