short circuit

Discussion in 'The Projects Forum' started by phoeny, Nov 28, 2012.

  1. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    im thinking about making a circuit that causes electrical shorts
    so how can i make this circuit to continuously cause safe electrical shorts without damaging the circuit?!
     
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    Why...............
    ?
     
  3. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    because im wondering if the power coming out the short can cause power to cause wheel motion
     
  4. tshuck

    Well-Known Member

    Oct 18, 2012
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    There is no such thing.....
     
  5. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    even if i save the current in a capacitor then disconnect the circuit before the short occurs to prevent the damage ?!
     
  6. tshuck

    Well-Known Member

    Oct 18, 2012
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    What is the relationship of current and voltage in a capacitor?
     
  7. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    well i meant the voltage.. listen the thing is that im wondering if i can use the power coming out the short to cause wheel motion
     
  8. wayneh

    Expert

    Sep 9, 2010
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    This doesn't make sense. Your power source can efficiently deliver energy to, say, an electric motor that can drive a wheel. You could use a heater to make steam to drive an engine and your wheel.

    A short is an uncontrolled excursion to high current that ends with something acting as a fuse, hopefully an actual fuse or circuit breaker but if those are not present, then the weakest link will stand in and take the heat. Why would you want to do that?

    When you say "short", maybe you are hoping to use a spark (not the same as a short) to generate heat? Such a thing is called an arc welder.
     
  9. tshuck

    Well-Known Member

    Oct 18, 2012
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    No wheel I've ever seen can convert electrical energy to mechanical....

    Either way, adding something in the path of a short circuit, by definition, is not a short circuit....
     
  10. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    the other day i'v witnessed an electrical short coming out the socket and there was this small explosion so i was wondering if i can make a circuit can make purposely make spark in a cylinder to cause wheel motion .. that is the idea im thinking about .. so how can i make this happen
     
  11. tshuck

    Well-Known Member

    Oct 18, 2012
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    Ever hear of an internal combustion engine?
     
  12. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    but this internal combustion engine uses fuel .. i want to do the same but using electricity not fuel so it wont cause emission
     
  13. wayneh

    Expert

    Sep 9, 2010
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    Using electrical energy directly in an electric motor is far more efficient than converting that energy to heat first, as your short did, and then trying to use that heat to power a motor. Heat engines are less efficient than electric motors.

    (Making the electricity in the first place and transmitting it to your house introduces big inefficiencies end-to-end, but the last bit from your wall to motor shaft-work is very efficient.)

    If you just want heat, burn the coal or natural gas that would have been used to make your electricity. You'll get much higher efficiency overall.
     
  14. tshuck

    Well-Known Member

    Oct 18, 2012
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    Electrical motor? Or are you wanting to directly apply the "short circuit" to move a wheel?
     
  15. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    yes directly apply the short circuit to move a wheel
     
  16. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    but i dont want heat i want fire
     
  17. tshuck

    Well-Known Member

    Oct 18, 2012
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    You need to transfer the electrical energy to mechanical energy.. an electric motor does this through magnetics....
     
  18. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    yeah but what im trying to do is saving electrical energy by pulsing the voltage instead of constantly feeding the motor as in electric motoros
     
  19. tshuck

    Well-Known Member

    Oct 18, 2012
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    A motor is not always "constantly fed"....

    If you do this fast enough, you are controlling the motor through PWM.... if you do this slow enough, you are severely killing your efficiency....
     
  20. phoeny

    Thread Starter New Member

    Sep 22, 2012
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    so your saying that my idea is not practical and can not be implemented ?
     
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