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Thread: Audio Shield lino out x 4 by OP-AMP

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  1. #1
    Senior Member
    Join Date
    Oct 2016
    Posts
    181

    Audio Shield lino out x 4 by OP-AMP

    Hi, do u have suggestions for a schematic op-amp amplifier x4 db working for the output of Teensy Audio Shield...
    TL074 ic is the best way?
    Is there a schematic example available for this?
    Thank u
    Dani

  2. #2
    Member
    Join Date
    Aug 2016
    Location
    Australia
    Posts
    63
    Hi,

    there are many suitable preamp modules available on eBay that will do the trick. most need a 12 v supply.

    The AD828 based ones might do the trick, as they will run on 5v. Beware, though that with a voltage gain of 4 (12dB) you will run out of headroom at 5v, with even a modest signal.

    I hope that helps.

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