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Amplifier for a couple of hours and zero rubles

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Added 51 a comment
Good time to all!
There was a need for scoring a small courtyard space. An audit of bins and boxes with not very necessary trash was made. An unexpectedly successful DRS-5001 satellite receiver was found quite lively, but not very relevant, as a case.


The following components were found:

Potentiometer 33kom.
Amplifier from old mayfuna TDA7375
- Capacitors 1000mf 25v in the power supply 5pcs.
- Capacitors 0.33mf and 47mf.
- Well, and the old connectors, wires from the washer, etc.
-Aluminum radiator from an old tv.

A case with power supply, respectively, is available, power is thought to be 25 watts. The main board of the receiver has been removed from the case. There was more than enough space.



The connection diagram of the amplifier microcircuit is the simplest, by this mounted installation. Yes, and the board I have nothing to do.


Soldered + and - 12 volts directly to the board. I threw filter capacitors on 12V, in the amount of 5000mF - let them be, if any. Install the potentiometer and LED in the front panel. From the power supply itself, a voltage of 3.3, 5 and 12v is output. The LED is powered from 3.3V through a 600ohm resistor. The output of the ST-BY microcircuit was powered directly from the 5 volt output, to turn on the microcircuit itself.

Amplifier for a couple of hours and zero rubles


Next, gluing the conclusions on the acoustics to the body with hot-melt adhesive, and audio inputs: I made two audio inputs, mini-jack 3.5 and tulips. Having a cable with the same connectors (mini-jack-tulips), you can combine connected devices. Be it DVD or smartphone.



Final stop attaching the amplifier to the radiator and the casing, soldering all components and checking operation. With the speakers 5gdsh4-4 worked fine, nor any distortion even at the maximum twisted volume. The sound is really beautiful, of course more thanks to 5GDSH.



The work took no more than two hours, with breaks. The cost of materials is zero rubles, nothing was bought, everything came to me "just like that." Well, in the end, not a bad amplifier.
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51 a comment
Author +2
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Quote: Ivan_Pokhmelev
You can give a person a fish, or you can give a fishing rod. You didn’t want to take a fishing rod, give you fish! )))
I have provided you with the opportunity to get out of the situation with honor, correcting the mistake myself. You did not want to do this. ((


Your opinion is very "important" to us. Further discussion is not practical. Good luck!
0
Reply To quote A complaint
"The MP3 format uses a lossy compression algorithm designed to significantly reduce the size of the data needed to play back the recording and ensure sound quality that is close to the original (according to most listeners), but with significant loss in quality when listening to a high-quality sound system."
"32-320 kbit / s with sampling frequencies of 32000 Hz, 44100 Hz and 48000 Hz for MPEG-1 Layer 3;"
How many “counts” will a signal with a frequency of 15000 Hz receive? Right, no more than three!
+1
Reply To quote A complaint
preferably not in mp -3!

And what did MP-3 not please you ??? This is just a "recording form" ... Bitrate can be different !!! And, naturally, in MP3 it is possible to write better than on vinyl or magnetic tape ...
0
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You are right ... With your understanding uh ... a little tight ... scratch So, better, really do not say anything else ....))))
+2
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For the coursework on mechanisms, the teacher lowered my score by 2 points only because in the drawings he showed a section of the grovers in the opposite direction (well, as the culman stood)! He explained that he would put 5 excellent student, who did everything in a decent design bureau, because all this science will not be useful to her, and the engineer must think through everything, to the smallest detail! Remember for a lifetime!
+2
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"Guys let's be friends!" (Cat Leopold)
0
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Yes, and I about the same! You need to listen to music on decent equipment, and (you’ll excuse the old man), preferably not in mp -3!
-3
Reply To quote A complaint
Quote: avit
Did you correct me? Not. )))
You can give a person a fish, or you can give a fishing rod. You didn’t want to take a fishing rod, give you fish! )))
I have provided you with the opportunity to get out of the situation with honor, correcting the mistake myself. You did not want to do this. ((
-1
Reply To quote A complaint
Quote: avit
I did not think that we were talking about such a trifle.
Wow - a trifle! If this is a trifle, then I will assume that your height is 1.5-2 mm, and call you microlilliput.
0
Reply To quote A complaint
Out of my ear I heard that their shamans know how to make a potion from fly agaric. Tambourine + potion give an incredible effect! smile And without a potion - only fog!
+1
Reply To quote A complaint
"The minimum USE-2017 points sufficient for admission to the university:

math - 27 points
Russian language - 36 points
physics - 36 points
chemistry - 36 points "
Not too lazy, asked what kind of points? Mathematics - 6 correct (guessed?) Answers from 20! Russian -16 out of 25 !. You need to select (guess) the correct answer from several proposed! A calculator has been posted on the Internet, selected an item, entered the number of correct answers in the column, got the result in points, you look at how many questions under the article such as "Help me!", "How to use?" We had serious educators. I had to communicate with the current ones - just awful! And on their own, without a good mentor, it is very difficult for 18 -19-year-olds to get a decent education. but a diploma is easy! I know a few concrete examples when university graduates receive three diplomas with three different specialties! And these "specialists" now treat us, educate our children ...
+1
Reply To quote A complaint
You are trying to rise up: "I don’t understand anything about this, but don’t dare to correct me!" )))
Did you correct me? Not. )) I also said that it was possible not to guess "riddles", but immediately indicate directly.

I looked back to see if she looked back
To see if I looked back. taunt
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
You are trying to rise up: "I don’t understand anything about this, but don’t dare to correct me!" )))

Did you correct me? Not. )) I also said that it was possible not to guess "riddles", but immediately indicate directly.
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
And then they were stupid that you don’t understand what was going on?

I did not think that we were talking about such a trifle.
-3
Reply To quote A complaint
Quote: avit
I assumed that this is a hint of MF (MF)
And then they were stupid that you don’t understand what was going on?
-3
Reply To quote A complaint
Quote: avit
And what, rose above the world? )))
You are trying to rise up: "I don’t understand anything about this, but don’t dare to correct me!" )))
+1
Reply To quote A complaint
By the way, about the tambourines. Someone from the peoples of the north (either the Chukchi, or someone else) came to us and beat them in their tambourines on the square (there was a holiday in the village). Sensations as if a head filled with cotton, fog. And not with me alone, I was talking with people about the same feelings.
Author +2
Reply To quote A complaint
Quote: Ivan_Pokhmelev
You, as usual, did not understand the meaning of what was written. ((
I just pointed out your technical illiteracy (if it were a typo, you would immediately understand. What's the matter).

Did I say somewhere that I'm technically literate? My education and work are not related to farads. But what, it was impossible to indicate directly? Let us make riddles) I assumed that this was a hint of MF (MF) .... now I understand that you just need to "get to the bottom" of something, anyway. Yes, there are such people ..) why do you need this? Like you're smart, but I'm a fool, I can’t write farads? And what, rose above the world? )))
0
Reply To quote A complaint
You, as usual, did not understand the meaning of what was written. ((
I just pointed out your technical illiteracy (if it were a typo, you would immediately understand. What's the matter).
0
Reply To quote A complaint
Korolev,
Schizgaden is for an extreme sportsman. There are others. For example, a souvenir from Rio. Parizh-Franciya-Tranzit - Suvenir iz Rio
You need to listen on quality with raising the bottom (without background 50Hz). The column should reproduce the bottom, of course. Watt at 25 ...
And the drummer must be helped with the flick of a finger ... He starts!
Listening to instrumental music on all sorts of smarts and stuff is not effective, Imho.
Author +1
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We do not understand each other (the meaning of what is written), further correspondence will only aggravate everything. Good luck.
0
Reply To quote A complaint
"Protons" were later. My first tape recorder was a tube recorder, and before it was a radiol. But in those days it was the highest achievable sound quality! Yes, and my parents didn’t like the Beatles and Peppers, although I liked their Waltz of the Flowers, Champagne Spray, Rio Rita, Argentine Tango, etc ... But it’s not about this, some nations for centuries have been indulging in tambourines and there are tams. I just wanted to say that today the quality sound is gone, and I mentioned the Philharmonic only because it is old and the hall is correctly designed for acoustics. And you are absolutely right, I think in an old-fashioned way and even I can’t writhe under “Shisgar” (unfortunately). smile
0
Reply To quote A complaint
You do this, what ??? I said that I like to listen to music “not at a construction site”, but at a construction site - only “short stories” ... And the answer was not for you, but Korolev, it seems, on his “At a construction site with music more fun” ... .
How is your answer related to this? ... You want to say that this amplifier will not reproduce text, but only, certainly, music !!! )))) ... but what does the telephone have to do with it? In your phone, in your opinion, is only the volume low? Is the frequency range higher than your amp? And are the basses good? ))) And the stereo base is wide? boss
0
Reply To quote A complaint
Sometimes, when communicating with youth, I feel pride in our Soviet education!

It’s simple, then they’ve "hammered it all", and now - "given to the mercy" ...
Who wants to - will be educated ...
+4
Reply To quote A complaint
I felt sorry for them, they never heard good music on good equipment, and they hardly go to the philharmonic or to the Catholic church (we have an organ there!)!

And we danced to "Proton", or "Electronics-323"? )))) The sound is the same, approximately .. Only a little more volume ...))) And our parents were "sorry" for us, because "Bonnie M" (in their opinion) is far from Claudia Shulzhenko! )))))
You somehow look at it through "your prism" ... At the same time, through "self-current" ...
And "you-present" does not need like this, all of a sudden, dance!))))
And they need !!! That's abrupt ... Now ... And then it follows ... "For lack of stamp we write on the usual ..." And it's okay ... (It's scary - this is when "For lack of a maid we fuck the janitor")))). That is, there is a measure for everything ... But even it - everyone has their own ...)
But I don’t go to the Philharmonic! (And this despite the fact that I have an absolute ear for music !!!) ... But I already took tickets to the organ music concert and look forward ... A matter of taste! What does anyone like ...
P.S. And "in parallel" with the body, I like Metallica .... Also, it seems, is nonsense ..))))
+1
Reply To quote A complaint
Sometimes, when communicating with youth, I feel pride in our Soviet education!
Author 0
Reply To quote A complaint
Quote: Valery
But in a good construction site it won’t work out - Even if I put good enough speakers, I won’t always be in one place!

And it was better to turn on the phone, and with pleasure not to hear it beyond a couple of meters?)
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
I'm not interested in what the author had in mind

If you are not interested, they would go with God, by. )))
Author 0
Reply To quote A complaint
Quote: Korolev
Well, now we have Jehovah’s, so to speak, education!


Well, my education is the most that neither is Soviet, of the 80s, so it's worth blaming it, not the current one. )
-1
Reply To quote A complaint
Well, this is a matter of taste! Once I watched as in one cafe several young people were dancing under a smartphone lying on a table! I felt sorry for them, they never heard good music on good equipment, and they hardly go to the philharmonic or to the Catholic church (we have an organ there!)!
0
Reply To quote A complaint
And with music, building is more fun.

Often I see (more precisely, I hear)))) that when working include music ....
But I can’t stand it when it’s "sounding" in a bad sound ... But in a good construction it will not work - Even if I put good enough speakers, I won’t always be in one place!)))) ....
I’m running, while I’m working, some “lightweight” audiobook (which you don’t need to think about and it’s not scary to “skip the canvas”))))
In the workshop, if I do something - yes, sometimes I turn on the music quietly. There I collected an amp of another Soviet production and “jibs” of 25 watts. If they are at "a little" power, and on the amp click on fine-tuning - a pretty nice background turns out ... Moreover, the speakers are at the ear level, approximately, and far from one another ...
-1
Reply To quote A complaint
Quote: Korolev
Well, we understand what the author meant
I am not interested in what the author had in mind. I see what he wrote.
-1
Reply To quote A complaint
Well, we understand that the author had in mind 5 X 1000 microfarads! Well, now we have Jehovah’s, so to speak, education! Recently, the State Duma considered the issue of legitimizing colloquial speech, such as coffee - it, etc. etc...
0
Reply To quote A complaint
Read carefullythat the author writes.
-1
Reply To quote A complaint
5 farads at 25 volts in such a volume ??
0
Reply To quote A complaint
Well, if not you, then I’ll definitely bump somebody! smile
0
Reply To quote A complaint
I hold in my hands 1000.0 X 25 V, not the smallest one, from Ost, measure: diameter - 10.2 mm, height without leads - 20.1 mm! I believe! It is possible!
Author 0
Reply To quote A complaint
Quote: Korolev
Thank you for your luck, we all need it! “What a right critic” I am not a right critic, I am an old, grouchy, poisonous ulcer! By the way, the topic of making knives was discussed here, can anyone grind according to my soul? smile

Well, definitely not me) I'm a pacifist, and I don’t really like knives.
Author 0
Reply To quote A complaint
Quote: Ivan_Pokhmelev
I do not believe! It's impossible.

Why is it not possible ??? Or am I not understanding the joke of humor? )
-1
Reply To quote A complaint
Quote: avit
5 pieces of 1000mf 25v + 0.1mf are wrapped in rubber from the lisaped.
I do not believe! It's impossible.
0
Reply To quote A complaint
Thank you for your luck, we all need it! “What a right critic” I am not a right critic, I am an old, grouchy, poisonous ulcer! By the way, the topic of making knives was discussed here, can anyone grind according to my soul? smile
Author +1
Reply To quote A complaint
Quote: Korolev
I sincerely hope that you carry out construction work more thoroughly. And the music is really more fun!

What is the right critic ... Good luck in your hard business ..)
-1
Reply To quote A complaint
I sincerely hope that you carry out construction work more thoroughly. And the music is really more fun!
Author +1
Reply To quote A complaint
Quote: Korolev
I was taught to respect work, including mine!

Well, in the same forest you see in the background, I have a construction site. There is no time to spend a day - two on the correct "beautiful" assembly. And with music, building is more fun.
Author +1
Reply To quote A complaint
Quote: Ivan_Pokhmelev
Together with finding the scheme, the selection of all the details? But only to solder, assemble and check - 2 hours is normal.

The circuit on the Internet is searched for in 2 minutes, the parts were taken from one old TV board, the potentiometers in the box - a selection of parts took about 10 minutes.
Quote: Ivan_Pokhmelev
You do not understand what I said. (((

5 pieces of 1000mf 25v + 0.1mf are wrapped in rubber from the lisaped. Perhaps something did not understand. Sorry, I'm not an expert, I only have a soldering iron and I can solder something to something, unpretentious.
-1
Reply To quote A complaint
Quote: avit
It is two hours with three breaks. There is nothing that could take longer.
Together with finding the scheme, the selection of all the details? But only to solder, assemble and check - 2 hours is normal.
Quote: avit
And not from an ax, but from what was.
That is, everything was stolen? ;)
Quote: avit
And about the capacitors ... let it be, there was already a spike on the "skis", well, I screwed it so as not to solder it on the chip.
You do not understand what I said. (((
+1
Reply To quote A complaint
I was taught to respect work, including mine!
Author 0
Reply To quote A complaint
Quote: Korolev
The idea is normal, the execution is not so hot, why luminka? MS directly on the case - less heat loss, and it will be more careful! Thermal adhesive push terminals? Do not ice!

Yes, I didn’t have to be more careful, the main thing was to be quicker, that’s why I need to do it (do not make holes and do not look for bolts with nuts), therefore I also need hot melt glue)) Well, the shopping mall keeps it normal, for that it saves time again.
Author +1
Reply To quote A complaint
Quote: Ivan_Pokhmelev
About "a couple of hours" - easy craftiness

Not at all. It is two hours with three breaks. There is nothing that could take longer. And not from the ax, but from what it was) And about the capacitors ... let it be, there was already a spike on the "skis", well, I screwed it so that it would not be soldered on the microcircuit.
+1
Reply To quote A complaint
The idea is normal, the performance is not so hot, why luminka? MS directly on the case - less heat loss, and it will be more careful! Thermal adhesive push terminals? Do not ice!

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