Cmoy with LED audio level

Discussion in 'General Electronics Chat' started by theta, Apr 9, 2013.

  1. theta

    Thread Starter New Member

    Sep 25, 2012
    Hi All,

    Inspired by the Crystal Cmoy project, I am building my first desktop amp. My design and layout is the same but I will be introducing the ALPS dual log pot as seen in many Cmoy design (so that I can control the volume).

    As everything is sealed in clear resin, I would also like to include a stereo VU/Audio level meter. The only concern I have is with volume. Most audio levels use a trimming pot to get the desired levels based on the audio input. My audio input will (by it's very nature) vary.

    So the question is - can I build an auto/averaging audio level. I am not going to be changing volume very often, but need the circuit to be flexible and change on an averaging basis to ensure correct LED display - too few LEDs vs. all lit up, is not desirable.

    I saw this circuit - it does not appear to use a trimming pot?