CMOY Headphone Amp
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  1. #1
    Tech Guru Fatlimey's Avatar
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    Default CMOY Headphone Amp

    Sorry I've been so quiet recently, been busy building some things.

    First up is a CMOY headphone amplifier in a mint tin. Plans are here and here and it really can be made for around $10-$15 is you have some resistors, sockets and stripboard lying around, $25 otherwise.





    This one has a fixed 10:1 amplification using the cheaper OPA2134P op-amp chip, which works perfectly with my cellphone's volume control for feeding into the car stereo. It's simple enough to add a volume control if you need one. The internal wiring is the best I could do without having any shrink tubing to hand. The next one will be much prettier inside... (the eternal cry of the perfectionist)

    An excellent second project, and converting the layout from protoboard to stripboard is good practice for rethinking component layouts.

  2. #2
    Dr. Bento BentoSan's Avatar
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    Nice job man!

    Its missing a big fat valve to chew though the batteries and burn a hole in your leg but its still friggen cool ! lol

  3. #3
    Tech Wizard
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    how long do the battaries last?

  4. #4
    Tech Guru Fatlimey's Avatar
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    Quote Originally Posted by Sheph View Post
    how long do the battaries last?
    No idea yet. Two 9V batteries running a low power amp and a single LED can't take too much juice, guess I should try to measure it. My guess is a month or two of occasional use? Certainly better than the phone!

  5. #5
    Tech Mentor
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    wowww nice job Fatlimey

  6. #6
    DJTT Ninja Mod tekki's Avatar
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    Nice Limey!

    The only addition I would really love to see is the addition of tubes?
    RSTRCTD | twitter | facebook (RSTRCTD) facebook (LJ) | vimeo | pinterest | my studio | soundcloud (RSTRCTD)| soundcloud (LJ)
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  7. #7
    Tech Wizard
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    and a more recessed on off switch.

    I think I'm going to duplicate this. good idea!

  8. #8
    Tech Wizard 14N-FR's Avatar
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    I bought one of Bioscience geeks CMoy amps (the original maker of them) and I have to say that that hooked up to my iphone with my V-Moda Roox earphones makes every piece of music an experience. I would highly recommend one!

  9. #9
    DJTT Dominator JesC's Avatar
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    Slap a DJTT sticker and sell some online thru the store. Nice mod, most people use those tins for other things...if you know what i mean.
    Controllerist: Think different | SoundCloud | MixCloud | Twitter |

  10. #10
    Tech Mentor j1n's Avatar
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    Quote Originally Posted by JesC View Post
    Slap a DJTT sticker and sell some online thru the store. Nice mod, most people use those tins for other things...if you know what i mean.
    Hehe....are you thinking what I'm thinking ...

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