Light Controlled Passive Volume

Discussion in 'DIY Discussion' started by alanl, Oct 19, 2004.

  1. alanl

    alanl

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    Hi,

    I would like to show off my latest DIY project a Light controlled passive volume control using Light dependant resistors.

    [​IMG]

    [​IMG]

    Its very simple, the only small problem is that the lowest volume is not zero.

    [​IMG]

    By far the best sounding type of volume control i've used so far. More detail to follow.

    The LDR part numbers NORP 12 Light Dependent Resistor. RS Components part number 651-507
     
    Last edited by a moderator: Oct 19, 2004
    alanl, Oct 19, 2004
    #1
  2. alanl

    I-S Good Evening.... Infidel

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    Interesting...

    No doubt sealing the box to make it light tight is an important factor, and equally maintaining the brightness of the LED to a fine degree (ie low noise on the LED supply)...

    Does it skip when you take flash photos? :p
     
    I-S, Oct 19, 2004
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  3. alanl

    michaelab desafinado

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    There's at least one manufacturer that uses a similar system in the top of the range (and astronomically expensive) amps. I remember reading about it in one of the mags but I can't remember the name of it now :(

    As long as the lowest volume is pretty low then it's not really a problem. I have the same issue with my transformer based passive pre but it's not a problem.

    Michael.
     
    michaelab, Oct 19, 2004
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