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Today we will build a simple mono audio amplifier on the TDA2003 chip.

The TDA2003 chip can be dropped out of the old radio or bought on the radio market.
The rest of the details as well.

Here is the amplifier circuit:

Simple VLF at TDA2003


The amplifier is powered by 3-12 volts.
The sound source may be a player or a telephone.
This circuit can be easily assembled by wall mounting.
My design fits in the casing of the music angel speaker.
Here's what I got:

Outside view:

Simple VLF at TDA2003


Inside view:

Simple VLF at TDA2003

Simple VLF at TDA2003


I did it very sloppy, but I think that you should do better.

You can also, if desired, make an operation indicator, a toggle switch and a charging port.

Simple VLF at TDA2003


Here is the speaker:

Simple VLF at TDA2003


I recommend putting a capacitor between the two contacts (I set it to 47 uf).

Simple VLF at TDA2003

Simple VLF at TDA2003


Thanks for your attention.
come back
Comments (17)
  1. feelloff
    #1 feelloff Guests March 14, 2013 19:02
    6
    What a nightmare! The author herself accuracy))))))
  2. wefl
    #2 wefl Guests March 22, 2013 10:40 PM
    0
    but it seemed to me that the outputs from the phone or player 2 and here it is 1 and grounding is a minus, if connected to it at least specify
  3. Arseny
    #3 Arseny Guests March 29, 2013 10:46
    4
    I am 10 years old I made this unch on tda. I have 2 speakers paired with 3.2 ohms sony. low and
    high frequencies go well ms warms up a little between 2 and 4 feet put the conder at 4.7 microfarads non-polar and everything will be fine
  4. Victor
    #4 Victor Guests June 6, 2013 19:44
    0
    Quote: Arseny
    I am 10 years old I made this unch on tda. I have 2 speakers paired with 3.2 ohms sony. low and
    high frequencies go well ms warms up a little between 2 and 4 feet put the conder at 4.7 microfarads non-polar and everything will be fine

    [b] Put mikruhu on the radiator .. not so warm it will be [/ b]
  5. 111
    #5 111 Guests August 15, 2013 20:11
    1
    How do you charge the battery? There, after all, is the Nokia BL5C? I just don’t know how to protect from overcharging.
  6. Naer
    #6 Naer Guests August 17, 2013 18:27
    0
    Quote: 111
    How do you charge the battery? There, after all, is the Nokia BL5C? I just don’t know how to protect from overcharging.

    As usual ... Via a USB charger, when the battery is charged, the battery power controller automatically turns off
    charging ..
  7. 111
    #7 111 Guests August 29, 2013 15:33
    0
    Right I confused myself. I forgot that the batteries are protected by phones. By the way, I have already assembled the circuit for a long time, it works, but in addition to the capacitor, it’s better to put a small choke into the gap (at + or - it doesn’t matter), you get a kind of low-pass filter, so it almost does not wheeze at high volume.
  8. newbie
    #8 newbie Guests November 22, 2013 23:15
    0
    pliz sfotkay condenser 0.1mkf
  9. kshmkshmmm
    #9 kshmkshmmm Guests November 23, 2013 18:57
    1
    how to remove noise. How to replace the radiator?
  10. Dmitry
    #10 Dmitry Guests December 17, 2013 04:28
    0
    3rd contact minus? And the grounding from the Conder, rezyuk, and omnica is also a minus?
  11. Yuri
    #11 Yuri Guests December 15, 2014 21:31
    0
    Hello everyone, there is an idea to make light music out of a light-shaped strip, and so that in addition it turns just doesn’t have enough mind)) can someone tell me or throw off the site with a shemkka
  12. Leonid
    #12 Leonid Guests August 3, 2015 17:44
    0
    He collected everything according to the scheme, he plays but words are very bad. What to do?
  13. Kirill
    #13 Kirill Guests October 26, 2016 02:19
    0
    And where to connect the sound input from the phone
  14. Konstantin
    #14 Konstantin Guests March 25, 2017 19:46
    0
    Everything works, thank you so much.
  15. GREK
    #15 GREK Guests May 6, 2017 6:49 a.m.
    0
    [b] Naer [/ b],
    How do you charge the battery? There, after all, is the Nokia BL5C? I just don’t know how to protect from overcharging.
    As usual ... Via a USB charger, when the battery is charged, the battery power controller automatically turns off
    charging ..

    This controller only works on discharge. Tested on personal experience, albeit by accident. 2010m almost burnt naively hoping that this circuit on Akum and the charge will be controlled. It is most optimal to order a special circuit for controlling the charge-discharge of lithium. Her price is 20 rubles, plus even with Akum charging she gives out 5 volts.
  16. Incognito
    #16 Incognito Guests May 28, 2019 10:45 PM
    0
    I tried 3 times to make an amplifier according to this scheme with 3 different microcircuits and everything did not work for me, and I soldered everything on the board.
  17. speed
    #17 speed Guests 13 august 2019 13:20
    0
    I wanted to smash the bread slicer for such installation

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