Volume control and tone control

Discussion in 'The Projects Forum' started by RodneyB, May 13, 2013.

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  1. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
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    I have built an amplifier for my car as per the attached diagram. It works no problem howeve the volume control using the 100K pots is very minimal. I am sing my ipod as the pre amp. Also the qualit is VERY tinny any dirction will be greatly apprcated
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    The output of an ipod is meant to drive earphones which have very low impedances.

    I would reduce the volume control pots to about 1k and make sure you specify log taper pots in your selection.

    I would increase the value of the input capacitor from 1μF to 10μF and reduce the 4.7kΩ series resistor to maybe 1kΩ.
     
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  3. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
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    Thank you for the advice I will make the changes and then get back to you.
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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  5. Ron H

    AAC Fanatic!

    Apr 14, 2005
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  6. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
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    I got the circuit from the internet

    Low Cost 2x20 Watt Stereo Amplifier Project by TDA2005

    www.circuit-projects.com
    & PITT's Electronics

    Other than the volume control which I will make the adjustments recommended by Mr Chips the circuit works fine.

    When I installed it into my car as soon as I turned the engine on there was a whining sound which got worse as I accelerated. What kind of suppression do I need to fit stop this

     
  7. Georacer

    Moderator

    Nov 25, 2009
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    @RodneyB,

    As per the site's ToS, automotive modifications are prohibited in AAC.
    As a result, this thread will be closed. Please don't try to re-create it.

    You may find answers in one of the fora listed here.
     
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