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Want to run kid's toy truck by adaptor

Discussion in 'Electronic Basics' started by Thaqalain, Jun 12, 2005.

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  1. Thaqalain

    Thaqalain Guest

    Truck is having 6 cells of 1.5 v general size.I connected all cell
    positions by fixing wire pieces in cell slots.Later I tried to charge
    by choosing required voltage of 9v,by connecting two end terminals of
    opposite polarity,but device is not producing sounds.
    What remedy I can do?
     
  2. Lord Garth

    Lord Garth Guest

    You need only concern yourself with the anode terminal of the first battery
    chamber and the cathode terminal of the last battery chamber. You do not
    need the connect a wire where each battery used to be. Apply the proper
    polarity at 9 volts and with sufficient current and the toy will run.
     
  3. Thaqalain

    Thaqalain Guest

    I done ,even open it's body and connected it's soldered terminals,but
    sure something short,what it could be predict it by experience.May be
    due to dropping from heights.
    Last week,my kids dropped a musical pad from top of sofa,it was very
    nice collection of tones.Can anyone predict,which component to be
    looked?where is problem in such cases?
     
  4. Chris

    Chris Guest

    Hi, Thaqalain. Your experience in your first post may have caused the
    wall wart to expire. You admitted to shorting it out, which may have
    let the smoke out of the wall wart. If you can't check it with a
    meter, I'd look into finding a known good wall wart first. These toy
    trucks may take up to an amp of current, so make sure you get one that
    can handle that much of a load. Also, try to avoid the ultra-small,
    ultra-light 9V adapters no matter what their current rating -- they
    have cheapie switching power supplies, which chuckle weakly and die
    when faced with a momentary short or the inductive kick of a toy motor.
    Get a fairly heavy one that's an "unregulated" 9VDC supply rated for
    at least 1 amp. And make very sure it says "9VDC", not "9VAC".

    Having checked that off, you may want to look at the innards of the toy
    and see that you've actually connected the wires of the wall wart to
    the wires coming from the batteries. Just twisting them together isn't
    good enough -- you'll have to solder. Be sure to provide some kind of
    strain relief -- you don't want the toy truck to drive away and pull
    off the solder joints.

    If that's checked off, it's conceivable you could have the wires
    backwards. That's especially the case if there's an IC,
    microcontroller or some such in the toy. You still may not have smoked
    the toy, though, because if it needs a polarized supply, they'll
    frequently put a blocking diode in series which may have saved the day.
    Try reversing the wires from your wall wart to the toy.

    You may be almost there. Keep trying.

    Good luck
    Chris
     
  5. Thaqalain

    Thaqalain Guest

    Thanks Mr. Chris for your knowlegeable reply.I will remember u in this
    forum.
     
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