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Real speaker made of orange

Electronics / Sound and Acoustics
Added 20 comments
Hello! Today I would like to tell you about the amazing homemade: the dynamics of the orange. It seems to me that this homemade product will be crazy for beginner hams. Moreover, it will very clearly show the principle of the speaker. Less words, more action!


Materials
1. Orange
2. Copper wire
3. Scotch tape
4. Paper
5. Neodymium magnet
6. A piece of sponge
7. A wire with a connector for music

Instruments
1. Kitchen knife
2. Scissors
3. Pencil
4. Hot glue

Step 1
First you need to take an orange and cut it into two parts



Step 2
Using a spoon, you need to pull out all the flesh from it.



Step 3

It is necessary to thoroughly grease it from the outside and from the inside with PVA glue, and then let it dry




Step 4

While the orange dries, let's do electronics. Take the wire (if there is no skein, you can pull it out of the old unnecessary cable) and carefully wrap it around a thick marker or glue pencil
Then remove and glue a few with a piece of tape so that the wire does not unwind





Step 5

From a piece of paper, cut a large circle and draw several lines, as shown in the photo

We make cuts and bend as in the photo


After we bent all the "petals", glue them together



Now apply the orange and cut off the unnecessary.



This part of the speaker is called the membrane.

Step 6
Now the most crucial part.
1. Lubricates the membrane with glue and glue our wire ring



2. Cut a small piece from the sponge and glue it to the center of the ringlet


3. Now glue the magnet to the sponge

In the end, you should get such a design


Step 7
The last step - we take the cable and strip two wires. Then we wind them with the ends of the wire ring

And glue the membrane to the orange



Well, that’s all, it remains only to connect our speaker to the phone (computer) and turn on your favorite melody.


How it works?
Everyone noticed that if you pick up, say, a twig and start waving it quickly, it makes a sound. If you start to wave faster - the sound becomes higher. Thickness and size also affect it.

So, the principle of operation of an ordinary standard speaker is based on these phenomena.

The signal entering the coil, which is located in the electromagnetic field of a permanent magnet, fluctuates depending on the amplitude of the received signal.And it swings the membrane (connected to the coil), which creates sound due to vibrations.

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20 comments
0
Reply To quote A complaint
You are right, the system is a fig, but it will certainly not work as efficiently as if a magnet was glued to an orange, but still it would be strange. It’s strange how people can think of a magnet glued to a membrane as stationary
0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
I argued with your statement that the coil should be stationary relative to the magnet.

I never claimed this, because argued the opposite.
Ivan, you obviously have not read my comments. Go back to the discussion:
You quote me
Quote: Ivan_Pokhmelev
speaker - a single stationary system, inside of which there is a movable - diffuser with a coil

Excuse me, but you got lost in the three pines. No offense. I respect your opinion.
0
Reply To quote A complaint
Quote: Dmitrij
Homemade looks like a phone from two cups and a thread.

So you yourself have confirmed that the idea is crazy: the sound quality is two floors below the baseboard.
0
Reply To quote A complaint
Nothing crazy here, it's a high-frequency speaker. The magnet is actually movably fixed, since the material to which it is glued is springy. When voltage is applied, the magnet bulges backward or forward, when music plays - it vibrates, vibrations propagate through the diffuser, interact with the air and here it is sound.

Homemade looks like a phone from two cups and a thread.
0
Reply To quote A complaint
What does it have to do with "relatively"? MNS1961 argued that the coil should be motionless relative to the magnetic system. But then how will the sound play?
0
Reply To quote A complaint
I do not argue with the fact that this is nonsense.
I argued with your statement that the coil should be stationary relative to the magnet.
0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
I have no doubt that you understand how the speaker works.

Dear Guru, but figs with him with a speaker device, we are discussing homemade work. You, with your wealth of knowledge in electrical engineering, still think that this homemade product is not
Quote: Nruter
bullshit
,
what did Nruter correctly call her?
0
Reply To quote A complaint
The misapplication of terms ... It has long been said "everything is relative" from the Theory of Relativity.
0
Reply To quote A complaint
Quote: MNS1961
How else to explain to you !!?

I don’t have to explain anything. But you constantly give mutually exclusive statements. I have no doubt that you understand how the speaker works. But you first make a false assumption
The magnetic system must stand dead dead in relation to the coil,
and then retell my thought
The coil moves in the gap of the magnetic system.
in your own words
the magnet is standing, the coil with the membrane (diffuser) moves inside it
and say I'm wrong.
0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
The coil moves in the gap of the magnetic system, well, in no way can it be stationary relative to it, then the diffuser will not move and there will be no sound.

Well, what is not clear? Magnetic system static, it is tightly fixed to the column body, and inside it moves a diffuser tightly connected to the coil.
Once again, carefully look at the homemade product that we are discussing. In it, this condition is not fulfilled.
Once again - the magnet is standing, the coil with the membrane (diffuser) moves inside it. Only in this way and in no other way. If the magnet will move with the coil of horseradish or any sound you will not hear. How else to explain to you !!?
0
Reply To quote A complaint
You contradict yourself by citing mutually exclusive statements:
the magnetic system must be stationary (fucking motionless) relative to the diffuser with the coil
and
speaker - a single stationary system, inside of which there is a movable - diffuser with a coil

The coil moves in the gap of the magnetic system, well, in no way can it be stationary relative to it, then the diffuser will not move and there will be no sound.
+1
Reply To quote A complaint
Quote: Ivan_Pokhmelev
Above Nruter led the speaker circuit. Consider it carefully to understand that you are wrong.

In my youth, when I played in an ensemble, I repeatedly had to repair speakers (rewind reels), i.e. I perfectly know their device from the inside.
The magnetic system and diffuser holder are a single system that tightly fastens to the front wall of the column (the stronger, the better). A diffuser with a coil is the second single system, which is located inside the first, as if in a suspended state and is movable strictly along the central axis to the magnetic system. When the speaker is operating, the magnetic system must be stationary (fucking motionless) relative to the diffuser with a coil (this rule is not observed in the homemade product under consideration).
The whole speaker is a single motionless system, inside of which there is a movable - diffuser with a coil.
0
Reply To quote A complaint
Quote: MNS1961
The magnetic system must stand dead dead in relation to the coil,

Higher Nruter led the speaker circuit. Consider it carefully to understand that you are wrong.
0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
But in any case, the magnetic system and the coil must be movable relative to one another.

You're not right. The magnetic system must stand dead dead in relation to the coil, which, only under these conditions, will produce oscillations in the magnetic field and, thereby, produce sound waves with the help of a membrane.
I agree with Nruter -
Quote: Nruter
And this homemade product is bullshit.

Such a system will not work, because the magnet should be at least securely attached to the bottom of the orange and fit perfectly (with a minimum gap) in the center of the coil.
0
Reply To quote A complaint
Quote: Nruter
The magnet MUST NOT be glued to the membrane.

Exactly. It is theoretically possible that the magnet is attached to the membrane and the coil is located on the base of the speaker, but it is less energy efficient. But in any case, the magnetic system and the coil must be movable relative to one another.
0
Reply To quote A complaint
Ok, I’ll write it differently. The magnet MUST NOT be glued to the membrane. Only a voice coil is attached to the membrane.
0
Reply To quote A complaint
Quote: Nruter
Well, haven't I written the same thing?

Of course not! Read carefully again:
Quote: Nruter
the magnet should be stationary relative to the membrane
0
Reply To quote A complaint
In real dynamics there is a permanent magnet. He is motionless. A cup with a voice coil wound around it is glued to the membrane. This voice coil is placed in the gap between the core and the magnet. When alternating current flows through the coil, electromagnetic waves appear that cause this coil to move relative to the rest state. The membrane moves with the coil and creates sound waves.

In real dynamics, the membrane moves relative to the magnetic system.

Well, haven't I written the same thing? The author and the coil and magnet are glued to the membrane. So how will they move relative to each other?
+1
Reply To quote A complaint
Quote: Nruter
the magnet should be stationary relative to the membrane

On the contrary! In real dynamics, the membrane moves relative to the magnetic system.And the author, just, the magnet practically, with the exception of the influence of the spongy material, is stationary relative to the membrane.
0
Reply To quote A complaint
In fact, the magnet should be stationary relative to the membrane with a glued coil. That is the case in real dynamics. And this homemade product is bullshit.

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