how to replace lm386 from circuit

Discussion in 'The Projects Forum' started by l1nuxg33k, Oct 30, 2006.

  1. l1nuxg33k

    Thread Starter New Member

    Sep 27, 2006
    7
    0
    How should I remove the LM386 from the Pixie-2 circuit
    http://www.qsl.net/we6w/projects/pixie2.gif

    so that I could just connect it to amplified computer speakers?
    What would be the signal and ground of the audio output?
    How should I connect the 1N914 and the 0.1uF? :confused:
     
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    It looks like it's already set up for line audio out.
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    I concur with MrMeval. Simply hook up the circuit audio out to your speakers.
     
  4. l1nuxg33k

    Thread Starter New Member

    Sep 27, 2006
    7
    0
    No, I meant I want to remove the LM386 from the circuit, in other words remove the audio amp from the circuit and use my own instead.
    To where should I connect the amplified computer speakers and where should I connect the 1N914 and the 0.1uF instead?
     
  5. l1nuxg33k

    Thread Starter New Member

    Sep 27, 2006
    7
    0
    anyone know how to do this?
     
  6. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    What type of audio amp do you wish to use in place of the op amp?
     
  7. l1nuxg33k

    Thread Starter New Member

    Sep 27, 2006
    7
    0
    Amplified computer speakers.
    In other words I want to get the unamplified output from this circuit.
     
  8. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    A "brute force" approach would be to simply take audio from Q2 emmitter. Or from pin 2 of the op amp. Ignor the diode - its job is to shut the op amp down when keying.

    I still recommend using the signal from the Pixie's "audio out."
     
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