need a circuit diagram

Discussion in 'The Projects Forum' started by salmanshaheen_88, Feb 25, 2010.

  1. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
    1
    I want to make an audio amplifier circuit, can anyone provide me its circuit design? I have searched google a lot but didn't find anything helpful. I am a student of electrical engineering but yet I am studying basics so plz provide as much help as you can.
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. ChrisChemist116

    Active Member

    Mar 13, 2009
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    Have you tried to look in magazines such as Elektor, Silicon Chip, etc?. To make a Audio amplifier circuits are so popular on such magazines, i would say "classic".
     
  4. ifixit

    Distinguished Member

    Nov 20, 2008
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    Google: LM386
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    How much power do you want? Stereo? Speakers ohmage?
     
  6. soda

    Active Member

    Dec 7, 2008
    174
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    Hi
    Here's a nice little amplifier for you. If you use R3 you can add a pre-amp to the amp.To prevent distortion, don't go under 15k for R3. I show 12v for the supply, but change it to a 15vdc input to make sure you get 7w rms output.
     
    Last edited: Feb 25, 2010
  7. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
    1
    Can anyone provide circuit diagram made by hand, I have seen all the stuff but even yet I have understand nothing, my professor just told me to make audio amplifier and thats it, he neither gave me list of components to be used nor circuit diagram.
     
  8. soda

    Active Member

    Dec 7, 2008
    174
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    Ok, this is the diagram. If you need more, then you have to Google for it
     
  9. onlyvinod56

    Active Member

    Oct 14, 2008
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  10. Audioguru

    New Member

    Dec 20, 2007
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    Soda,
    Your TDA2003 amplifier is missing many important parts that are shown in its datasheet.
    It does not need the resistor you added to the input.
     
  11. soda

    Active Member

    Dec 7, 2008
    174
    13
    Hi AUDIOGURU,
    I used this amp to amplify the output of a ne555 siren for my house alarm project. Without the 15k resistor the sound was distorted like crazy.

    I also use this amplifier for a so called home made tape player. The tape player output was in the region of 215mV and without the 15k resistor, the amp start to distort. I read the data sheet of the TDA2003 and according to it the input sensitivity of the TDA2003 is in the region of 65mV. Maybe i got it all wrong because I'm not a expert electronic guy, but i only do it as a hobby. So, if you think my way of understanding the date sheet is wrong, then please show me the write way because I'm always open if I can learn more from a more experience person.
     
  12. Audioguru

    New Member

    Dec 20, 2007
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    You should have used the circuit in the datasheet because it was designed by the experts who designed the IC.
     
  13. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
    1
    what's this TDA2003? i guess it is a diode, and how much input supply I should give? AC or DC?
     
  14. Audioguru

    New Member

    Dec 20, 2007
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    Why don't you look at its datasheet?
    It is a car radio power amplifier IC.
     
  15. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
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    I told you in the beginning that I am studying basics yet
     
  16. Audioguru

    New Member

    Dec 20, 2007
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    You asked, "What's this TDA2003?". It doesn't matter if you are studying basics. Anybody can look for it in Google or look in www.datasheetarchive.com .
    The datasheet tells you all about it and shows its specifications.
     
  17. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
    1
    haven't got any easy diagram yet :-(
     
  18. Audioguru

    New Member

    Dec 20, 2007
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    The schematic in its datasheet is easy, but newer car radio amplifier ICs use a circuit with more output power and fewer parts.
     
  19. frpr666

    Active Member

    Feb 2, 2010
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  20. salmanshaheen_88

    Thread Starter Active Member

    Mar 5, 2009
    88
    1
    my teacher told me that my amplifier must have a mic to produce sound, now what to do with it???
     
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