Electronics OpAmp advice

Discussion in 'Modding' started by BjD, 15 Mar 2004.

  1. BjD

    BjD What's a Dremel?

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    I have a stereo VU meter, the old school analogue type with needles, and am trying to hook it up to my stereo. Found this circuit which looks like i'll do the job nicely :thumb: Problem is the opamp, Ive had a look through Rapid but cant see the CA3140, can anyone suggest a suitable alternative. Never played with MOSFET opamps before :blush: If theres a dual type as well thatd be even better, make the circuit a litle neater.

    Thanks
     
    BjD, 15 Mar 2004
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  2. cpemma

    cpemma Ecky thump

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    Look under fet opamps, CA3140E, 82-0688. It's a very common one, Maplin & ESR also have it. CA3240E is the dual version, also at Rapid. :thumb:
     
    cpemma, 15 Mar 2004
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  3. BjD

    BjD What's a Dremel?

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    hmm yeah i obviously didnt look hard enough :blush: Cheers
     
    BjD, 15 Mar 2004
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  4. biff

    biff What's a Dremel?

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    The TL071 is a pretty common unit to and seems a little higher performance than the one spec'd...not that you need high performance for this circuit though.
     
    biff, 17 Mar 2004
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