Steady hand buzzer game

Discussion in 'Homework Help' started by craig736, Jan 5, 2014.

  1. craig736

    Thread Starter New Member

    Jan 5, 2014
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    Hello. Sorry this is a very simple question. I have built a steady hand buzzer series circuit for my son. I am using a 9V battery and a buzzer. When I test the circuit using standard copper wire the circuit work and teh buzzer goes off. However when I replace the wire with 2 mm copper cable the buzzer does not go off. Any advice pse
     
  2. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Is the copper cable isolated?

    Perhaps a picture of both might give us more info.

    If so, the buzzer won't go off.
    You will need un-isolated wire for the game.

    Bertus
     
  3. craig736

    Thread Starter New Member

    Jan 5, 2014
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    The copper cable isn't insulated. The only thing I can think of is that it's something to do with the lower resistance of the copper cable because it works with the copper wire. Would that make a difference?

    Picture attached. Hopefully!
     
  4. #12

    Expert

    Nov 30, 2010
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    It looks right. If the new wire is not coated with transparent enamel like a transformer would use, you have simply gotten a bad connection somewhere...or maybe the light bulb burned out?
     
  5. KJ6EAD

    Senior Member

    Apr 30, 2011
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    Similarly to #12, I'm guessing that you have a screw terminal tightened down on insulation (enamel or PVC) instead of bare metal.
     
  6. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    You can test if the wire has this enamel coating by holding the testpins of a DMM on the wire using the continuity test and hear if the beeper goes of the DMM.

    Bertus
     
  7. craig736

    Thread Starter New Member

    Jan 5, 2014
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    Thank you both. I'm reckoning it has a thin plastic coating over the copper cable. I'll get to it with emery paper tomorrow.
     
  8. Metalmann

    Active Member

    Dec 8, 2012
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    Sometimes, I'll use a cigarette lighter to burn off insulation on small diameter wires. Just don't hold it there very long.
     
  9. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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    Or I will go to a craft's store, like Michaels, and buy a roll of bare copper wire.
     
  10. #12

    Expert

    Nov 30, 2010
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    2mm resembles 12 gauge American. Just strip some house wiring wire to get naked copper. Got a leftover hunk of it in the shed?
     
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