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Turntable-playable Sound Card

 A PC Sound Card which can be used like a vinyl record
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This is just a quickie art project doobrey - absolutely no utility.

There are postcards which can be played on record players, embossed with a spiral groove on which one places the stylus. There are also sound cards which have the disadvantage of having blobs of solder on one side and components on the other. Take two blocks of plastic, stamp a groove recording on each side and encase a sound card in it, and you have a record which can be used as a sound card/sound card which can be used as a record. In fact you could even have the sound card provide some kind of functionality to the record player by bluetooth and stuff going on to process audio inside it, but in general the idea is to have a sound card which you can plug into a PC which you can also put on a turntable and play.

That's it.

—nineteenthly, May 07 2020

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       What about the hole in the middle?
—pocmloc, May 07 2020
   

       And the thickness - if it is more than a few mm thick, the turntable needle geometry will be all messed up.
—pocmloc, May 07 2020
   

       And the auto-lifting mechanism that a lot of turntables have - there might not be much room for audio tracks if the card is not mahoosive.
—pocmloc, May 07 2020
   

       // What about the hole in the middle? //   

       Fill it with jam ?
—8th of 7, May 07 2020
   

       Doughnut dough that.
—pocmloc, May 07 2020
   

       I have had thoughts about these things. The components can be embedded in a thinner package rather than being mounted on a surface, with tracks between them. After a cursory search, I haven't been able to find info on the thickness of a 78 disc, but apparently iphones are 6.9 mm thick. Is it too much to hope for some kind of convergence there?   

       Next to that the hole in the middle is not problematic.
—nineteenthly, May 07 2020
   

       Getting the inertial balance worked out we'll leave as an exercise for the students.
—RayfordSteele, May 07 2020
   

       This could be done with a USB sound card/speaker made in a disc format. It would need to be no thicker than a micro-USB "A" connector.
—8th of 7, May 07 2020
   

       Could a transistor junction be changed to sense a massive needle passing over head?   

       The grooves could supply a baseline pattern affecting the higher internal computation, depending on where it is in the track.
—wjt, May 09 2020
   

       Mini turntable!
—chronological, May 10 2020
   

       // Could a transistor junction be changed to sense a massive needle passing over head? //   

       A Hall-effect device could do that, but not a bipolar or unijunction transistor.   

       Some types of FET might just be able to sense a nearby conductive object.
—8th of 7, May 10 2020
   

       That's unnecessarily simple. Obviously what's needed is a device with three little robotic arms that wiggle the needle on the record player.
—Voice, May 10 2020
   


 

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