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Playing music using old hard drives


In the garbage container, the master found an old working player without speakers and a bunch of hard drives. During experiments with hard drives, the master accidentally brought sound from the player to them. Well, then it became interesting to him, and he decided to see what happens if you output the sound to several discs by combining them into an audio system.

Let's watch videos with an example of how such an audio system works.


Tools and materials:
- Screwdrivers;
-Soldering accessories;
-Multimeter;
-HDD;
-Audio cable;
-Player;
-Wire;
-Plastic cups;
-Boards;
-Fasteners;

Step One: Theory
The wizard notices some similarities between the speaker and hard drive. In the dynamics there is a permanent magnet and a coil (resistance can be 4/6/8/16/32 Ohms).

The hard drive has a permanent magnet drive and a coil (its resistance is about 7-11 ohms).


Step two: coil contacts
Disassemble the hard drive by removing the top cover. Take off electronic board under the hard drive.
Locate the drive lever connector (this is the one with the most pins) and, using a multimeter, try to ring the two tracks going to the coil. Resistance should be 7-11 ohms.

If you can’t ring, then you can try to trace the tracks from the coil to the connector (these are larger tracks on the loop).





Step Three: Audio Cable
Once you have identified the coil contacts, solder the wires from the audio cable to them. The master used old headphones with a 3.5 mm jack.

Strip the wires (stereo left audio, right audio and ground),
For monaural sound, connect the right and left audio together and solder to one output of the coil, solder the ground to the other output.

Stereo audio needs two hard drives. The earth is soldered to both coils and one wire to the contacts of the coils.
Connect the 3.5 jack to the sound source (phone, computer,) and increase the volume all the way.

Now you can hear the sound.The sound is weak, but you can install a plastic cup and the sound will be louder. If you need a good sound, then go to the next steps.






Step Four: Sound Enhancement
To amplify the sound, you can try the following steps.
Find the right hard drive. Hard drives are different in size, number of revolutions (although the drive in this case does not spin), volume, and how the head is parked. All this affects for better or for worse. Need to test and experiment.
Keep the drive lever in precise position. The correct position of the lever affects the sound.

Using an audio amplifier to amplify the sound.

Combining multiple hard drives and installing them in a case.







You can connect hard drives in parallel or in series. The master claims that when connected in parallel, the sound is better.


Playing music using old hard drives





Well, at the end of a few test videos.





The master plans to connect a hard disk controller and check the sound on a rotating disk, as well as add a sound amplifier to the LM386 or 2N6292.
5.5
6.2
6.5

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11 comments
I once led a radio club. One kid experimented with a flopp, recorded music on a floppic, since then everyone switched to 3.5 ", 5.25" was in bulk. He dazzled his DAC-ADCs, then he acted and never returned, he went upstairs, talent.
Guest Nikola
Full doing fuck is called
Quote: Dmitrij
Inductance, probably, or what it is there.

Capacity, most likely.)))) If instead of a wire there, as often happens, a wide insulated bus is wound, and after disconnecting the electrode from the socket, it does not touch the ground, then this bus worked like a capacitor plate. (And was it in the heat? In very dry weather?)
Theorizing. But nothing else comes to mind ...
Valery,
no, it didn’t beat, nipped a bit when with his bare foot on the ground (loony, huh?)))

And it hit hard for a long time, transformer. I turned it off, she stood for an hour. Then he began to rewind and touched the plug, as she e ... la! Inductance, probably, or what it is there.
Dmitrij,
But didn’t you still know that in wet weather they don’t cook on the street because electric welding beats ??? ... The first time I got it?))))
... You have very good grounding ... And the currents are terrible.
I do not know the mechanism (did not think. Laziness.))). But, to ignite there 70 Volt of everything ... So, that's not the point, I think. Indeed, the strike, you see, is not the same as 220. I mean, figuratively, then 220 is a “whip”, and welding is a “club”.))) “Soft, but strong.”))))
P.S. Also received a couple of times. So I know what is fucking, but ... I want to finish already, and here is a weak-a-a-little abyss fuzz ... And I know, but ... And then you sit, blink ...)))) .. . And immediately, "Well, fuck him!" ....
by chance

But me cheto welding hit today, everything was raw. He just touched it with an electrode as it smells, all muscles were spasmodic on one side. Type voltage ignition arc slipped.
Korolev,
I hope you understand what sounds fly out of me when I get energized! xaxa

Those through the mouth are still not the worst ..... smiles
pogranec,
not long ago I drilled a wall and drilled a wire. By chance
Somehow a long time ago, in the last century, laid a LAN in the control building of one factory. Quite by accident, I drilled a zero core of wire, of course, without noticing it. But when the tension disappeared in the whole wing of the building, he quickly realized what was happening. A half-drunk electrician was perplexed: "There is a phase, the machines are in order ...". I must say that he had only an indicator - a screwdriver!
My first intention was to use these old hard drives to add real percussion to my Musical Floppy Drive system
Percussion - the name of percussion instruments and playing them
Well, there is a purposeful, meaningful work, and then:
master by chance brought the sound from the player to them
Keep drive lever in precise position
Than? Hussars, keep quiet !!!
I hope you understand what sound came out on me
I hope you understand what sounds fly out out of mewhen I get stressed! xaxa
Author
Korolev,
Well do not languish, share how it happened
- Not long ago I drilled a wall and drilled a wire. By chance. I hope you understand what sound came to me through the chain wire - drill - screwdriver - me. -)))))
And he says, “My first intention was to use these old hard drives to add real percussion to my Musical Floppy Drive system. But during my attempts to figure out what voltage is required to move the read head lever from one side to the other , I can get the sound out of the hard drive. "
Keep the drive lever in precise position
. I would like more detail.
- there is no recipe, everything is done experimentally. And as I understand it, each drive is configured in its own way.
By the way, I forgot to write that you need to disable the parking system.
As for the corps, I agree, but apparently the person was carried away.
During experiments with hard drives, the master by chance brought the sound from the player to them
Well, don’t torment, share how it happened, otherwise I turned all my brains inside out, trying to simulate the situation!
Connect the 3.5 jack to the sound source (phone, computer,) and increase the volume all the way
The hard drive has a drive with a permanent magnet and a coil (its resistance is about 7-11 ohms)
A good way to ditch the line-out!
Keep the drive lever in precise position
I would like more detail.
Combining multiple hard drives and installing them in a case.
Well, I understand, play around, but in the case I will find something better!

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