Connect with us

Audio channels input problem

Discussion in 'Audio' started by Ouroboros5, Aug 20, 2010.

  1. Ouroboros5

    Ouroboros5

    2
    0
    Aug 20, 2010
    hello, i build the lm386 audio amp circuit to drive the input if an mp3 to a small speaker but when it comes to audio tracks that use both audio channels one is very weak. I have a 1/8 stereo phone jack where both outputs go to one side of a 10k pot and the other pin is grounded. In the 10k pot the middle lead goes to pin 3 in the lm386 and the other is grounded. Ive tried to connect the negative pin in the phone jack to the grounded lead of the pot but it gives me the same result. as for the speaker the positive is connected to pin 5 and the negative to ground. is there something wrong with setup? Do i have to supply one pot for each channel? Or is there something wrong with my ground?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,178
    2,690
    Jan 21, 2010
    Is it a dual pot (i.e. with 6 connections -- 2 complete potentiometers) or just a single pot (3 terminals).

    If the latter, then you're converting the signal to mono by combining both of them. That may be fine if you only have a mono amplifier though.

    it would help greatly if you provided a circuit diagram
     
  3. davenn

    davenn Moderator

    13,260
    1,748
    Sep 5, 2009
    ok

    well here is one commercial way mixing a stereo input to a mono output is done

    as a variation you could omit the 2 trimpots on the input and have a single pot on the line after where the 2 channels combine

    cheers
    Dave
     

    Attached Files:

  4. Ouroboros5

    Ouroboros5

    2
    0
    Aug 20, 2010
    Its just a 3 terminal pot, i put both inputs in 1 terminal
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-