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    This is a dynamic audio compressor which outputs a constant audio level and can be used for FM transmitters too. It uses a preamplifier with TDA 1054 produced by SGS-ATES. IC1a is a preamplifier stage with a total gain of 50 (1 + R5/R4). IC1b is connected as a amplifier stage with a 400x gain (1 + R11/R10).
    The audio compressor power supply has 9V.

    Schematic of DIY Audio Compressor Circuit

    audio compressor TDA1054

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    One Response to "Audio Compressor Circuit with TDA1054"

    1. thanks for this site, it can give me a new principle on my own electronic project

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