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Cd player turn table Answered

So I want to try to turn a old sony cd diskman circa 1999 into a turn table for cds. My idea here is to have it play but I can stop the disk with my finger and hopefully get a skipping effect, the other idea is to be able to freely move the laser eye and have it still play while doing it. I already have it soldered up so that it can play without the case and have a 9 volt connected to it, but thats about it. Anyone have any idea on how this could be? 

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wickednick

7 years ago

I understand it wouldn't work exactly like a normal turn table. All I really want it to do is to make it skip but with more control over it. I've managed to figure out how to get my cd players wired so that they can play without the enclosure, but I've noticed that when I try and move the cd with my finger the cd player will stop playing or get an error and stop working. I guess what I'm looking for is to find a way to get it to always read the disk which out it getting an error.

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caitlinsdadwickednick

Reply 7 years ago

Unlike a real phonograph platter where the needle can play anywhere you drop it, CDs contain digital data which has to be read in distinct blocks of bits and bytes relative to some starting or header data. Unless you have a way of adapting the hardware and firmware on the CD reader to be able to adapt to that "random" jumping around it will have an impossible time to be able to play or give you a coherent sound. I think most DJ type devices will read in a few seconds before and after where it is playing, put it in a memory buffer for you to "scratch". You might have to do some external sound processing to get your effect. Good luck.

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lemonie

7 years ago

No, they don't work like that.
You may get it to skip& jump, but the effects you want are better done with software and a different turny-thing.

L

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FoolishSage

7 years ago

I dont think it is possible to do the effects on a cd as one would usually do on vinyls due to the far higher rotation rate, but trying should be very simple (bypass the lid detector with a bit of plastic and touch the cd). Moving the laser eye shouldnt be too hard either (remove the actuator mechanism and introduce a push rod) but I strongly doubt you would get any useful effects out of it.

Give it a go and see what you come up with. If all else fails you can always take it apart for components! Good luck.