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How to make Toy Voice Changer (AA battery) Run on 12 Volt

Discussion in 'Power Electronics' started by FrankTank, Aug 11, 2015.

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  1. FrankTank

    FrankTank

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    Aug 11, 2015
    I am trying to work on my golf cart.

    I am thinking of buying a wolo horn to run on the golf carts power.

    I also have a cool toy for the kids that changes your voice.

    The voice changer runs on 3 AA batteries. How would I begin to run this to the golf cart with an on/off switch?

    Brand new here no clue where to begin.

    The wolo horn MIGHT buy is wired to run 12 Volts....so not sure if I can combine the 2 but would rather run separately.
     
  2. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    Welcome to EP!
    Go to your local dollar store and pick up an in-car USB charger (12V to 5V converter). The toy won't object to 5V, since 3 fresh AA cells supply about 4.8V.
     
  3. FrankTank

    FrankTank

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    Aug 11, 2015
  4. Colin Mitchell

    Colin Mitchell

    1,416
    314
    Aug 31, 2014
    Fit a bigger speaker.
     
  5. FrankTank

    FrankTank

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    Aug 11, 2015
    Seriously, do I need some sort of small amplifier?

    Would it really work with just a bigger speaker? I doubt it
     
  6. FrankTank

    FrankTank

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    Aug 11, 2015
    Anyone????

    How about a fuse? How many amps?

    No clue where to start.
     
  7. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    Something like that, though a lower power one would probably be adequate.
    Yes. One that can be run from 12V. Don't expect hi-fidelity sound: the amp will amplify any existing distortion.
     
  8. FrankTank

    FrankTank

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    Aug 11, 2015
    Can anyone give me specifics to use?Lower power? such as?

    just want it a little louder and able to run of the golf cart battery.

    I just need fuse type and size, type of converter, and type of amplifier. Links will help:)

    I don't wanna break/blow the circuit board from the voice changer.
     
  9. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    Would you be able to build a converter and an amplifier (e.g.from a kit), or are you looking for an off-the-shelf solution?
    How are you planning to identify the necessary connections to make to the toy in order to amplify its output?
     
  10. FrankTank

    FrankTank

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    Aug 11, 2015
    Off-the-shelf solution please.

    I've already identified the power source(red/black wires).
    And the 2 speaker wires.

    What else would I need to identify?
     
  11. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    Nothing.
    Since "just want it a little louder" is subjective and we don't know the power the toy speaker handles it's hard to advise on what power rating would be best for your purpose. I'd guess a couple of Watts. Try googling for 1W, 2W or 5W audio amplifiers which can be run from 12V. What size speaker do you have room for (it would need to be in a cabinet/box)? Presumably the speaker (and electronics) would need to be waterproofed?
     
  12. FrankTank

    FrankTank

    37
    0
    Aug 11, 2015
    just want it loud enough for the kids to use/hear while riding on the cart.

    I don't care it could be a 3 inch speaker.

    What size fuse would be sufficient connecting the power from toy to battery?
     
  13. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    A 3 inch (8 Ohm) speaker (cheap transistor radio type) will typically handle about 1W of power, so a 1W amplifier should suffice for that.
    We don't know the current draw of the toy, but I doubt it would be as much as 500mA. The fuse would go between toy and converter (not battery). The converter should have its own fuse.
     
  14. FrankTank

    FrankTank

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    Aug 11, 2015
    do they make 1 watt plug n play amps?

    All I see on google are circuit board kits, soldering kits, etc
     
  15. FrankTank

    FrankTank

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    Aug 11, 2015
  16. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    I don't know. Like you, I see kits advertised.
    Looks ok.
     
  17. FrankTank

    FrankTank

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    Aug 11, 2015
    what size fuse should I buy to put an inline just in case?
     
  18. Alec_t

    Alec_t

    3,007
    813
    Jul 7, 2015
    Depends on the spec of the amplifier you get, but I'd guess no more than 1A.
     
  19. FrankTank

    FrankTank

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    Aug 11, 2015
  20. davenn

    davenn Moderator

    13,902
    1,971
    Sep 5, 2009
    no it doesn't

    yes you should
     
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