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Driving earphones with LM324 Opamp?

Discussion in 'General Electronics' started by Stutzer, May 26, 2004.

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  1. Stutzer

    Stutzer Guest

    Hi there,
    I intended to design a litte, simple audio mixer based on a
    voltage-adder realised with LM324.
    Unfortunately I don't hear anything coming out of the output yet.
    So my question is: How do I have to design the "output part"?

    Shoud it be ok to just connect the earphones in series with a small
    resistor (eg 30 Ohms) between the output of a LM324 and ground?
    (I drive the LM324 in dual supply mode with +5/-5 Volt..but I think this
    should work, shouldn't it?)

    Please help me out..
    D. Stutzer
  2. Externet

    Externet Guest

    What impedance headphones ?
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