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Guitar Pedal Project!

Discussion in 'General Electronics Discussion' started by TrisMcKee, Apr 25, 2012.

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  1. TrisMcKee

    TrisMcKee

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    Apr 25, 2012
    Hey guys, first post on this forum. I'm working on making a higher capacity battery than a standard 9v for my guitar fx pedal. It's rated 300mAh, so obviously a 9v battery can't power it long, only about an hour and a half. So, what I've got is a 7.4v 1500mAh Li-ion camera battery pack. What are my options for getting this up to the required 9v? I was thinking about adding a 1.4-1.7v (AA I guess) battery in series which would probably get me the required voltage, and because AA's are so much cheaper than 9v's, I would only have to replace the AA, and just recharge the camera battery.

    That's just my basic plan, all feedback is welcome, and I want to know if this will actually work or not? I'm not too good with voltages and amps and whatnot.

    Cheers :)
     
  2. CocaCola

    CocaCola

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    Apr 7, 2012
    Try it as is, it might very well work just fine...

    Also, I assume there is always 'power' when you play since it's an electric guitar, so why not use a wall-wart (power adapter) and not worry about the batteries at all?
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    You may find that the circuit operates fine from 7.4V and that the additional battery is not required.

    Placing dissimilar batteries in series is really bad.
     
  4. TrisMcKee

    TrisMcKee

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    Apr 25, 2012
    I've tried it off the camera battery alone and it wouldn't turn on, would the alkaline battery and the li-ion battery working together cause any problems? I dont want this blowing up in my face :pp
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    I would recommend against it, however it's most likely to damage the AA cell since it is unlikely that the Li-Ion battery will discharge too far -- but no guarantees.
     
  6. TrisMcKee

    TrisMcKee

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    Apr 25, 2012
    I'll try it and see how it goes, but is there alternatives? A 9v is too weak and expensive, and getting a plug on stage might be hard to do for the wall wart.

    Cheers :)
     
  7. KJ6EAD

    KJ6EAD

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    Aug 13, 2011
    Last edited: Apr 25, 2012
  8. BobK

    BobK

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    Jan 5, 2010
    Scratching my head over why a guitar effect pedal would take 300ma.

    Bob
     
  9. KJ6EAD

    KJ6EAD

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    Aug 13, 2011
    It doesn't. That's just a rating from a label.
     
  10. TrisMcKee

    TrisMcKee

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    Apr 25, 2012
    Keep in mind that it is a multi-fx pedal, the kind with all the digital effects, it's not your typical stompbox pedal
     
    Last edited: Apr 25, 2012
  11. CocaCola

    CocaCola

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    5
    Apr 7, 2012
    I have worked in and around the touring music industry for about 30 years now, both local and national (world) touring acts... You should be able to find a plug, especially if you plan ahead and bring your own power strip and extension cord...

    Short of that a battery pack like has been suggested, get one running of C or D cells and you will exponentially increase your run time over a 9v...
     
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