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Blowing Up Resistors and Capacitors

Discussion in 'General Electronics' started by KellyClarksonTV, Jun 10, 2004.

  1. Has anyone ever connected Resistors or Capacitors to high voltages in excess of
    their rated voltages? I once connected a 1-ohm resistor rated at 1/2-watt to a
    51-volt battery and it instantly bursted and shot out a piece of carbon from
    inside. I've also connected one-way capacitors the wrong way or to AC power. I
    like how they burst like firecrackers. Another time I short-circuited a
    12-volt, 2000mA transformer and the box cracked because of the high heat.

    Has anyone attempted these stupid stunts?
     
  2. Dbowey

    Dbowey Guest

    RE:

    << Has anyone ever connected Resistors or Capacitors to high voltages in excess
    of
    their rated voltages? I once connected a 1-ohm resistor rated at 1/2-watt to a
    51-volt battery and it instantly bursted and shot out a piece of carbon from
    inside. I've also connected one-way capacitors the wrong way or to AC power. I
    like how they burst like firecrackers. Another time I short-circuited a
    12-volt, 2000mA transformer and the box cracked because of the high heat.

    Has anyone attempted these stupid stunts?
    Yes, but except for you, I can't recall any who survived.

    Don
     

  3. Not intentionally
     
  4. Art

    Art Guest

    Can't really see how this will increase the physical sizes of these items,
    maybe I missed the implied idea? Blowing Up indicative of enlarging
    physically such as a balloon??
     
  5. N. Thornton

    N. Thornton Guest

    I think most of us have one time or another. But just occasionally
    your efforts at cockup get defeated: once repaired something several
    years old, only to find a 16v electrolytic in it running on 21-23v of
    the wrong polarity. Weird thing was it had worked fine for years.

    Regards, NT
     
  6. N. Thornton

    N. Thornton Guest

    My vote goes to carbon resistors. With a kilowatt or so through a
    third of a watt R you get a very intense arc light. Better hope you
    cant see it, or you wont be seeing anything for a while. Dont try this
    intentionally!

    Regards, NT
     
  7. I have safer and better things to do with my time. I think you need a
    life, or a hobby!

    Jerry G.
     
  8. David Moreno

    David Moreno Guest

    Has anyone attempted these stupid stunts?

    Have your tried to connect a carbon-mine of a pencil to
    a Voltage source ?!, Whow ! what a light ! =D
     
  9. stoj

    stoj Guest

    thats what my days in science class consisted of. also trying to make the
    cabon-graphite pencils blow up by running AC voltage through them.
    those were the days
     
  10. That IS his hobby. Doesn't seem that interesting to me, though. Its
    not that much of a challenge to make something fail.
    GG

    <snip>
     
  11. Rich Grise

    Rich Grise Guest

    Ever cook a weenie by putting a fork in each end, and sticking the
    forks in two glasses, one to each line of a suicide cord?

    Cheers!
    Rich

    PS. Me Neither. ;-)
     
  12. We had blown up a capacitor in a high school electronics class once.
    It's been some time, but I think it shot out a spiral-ish string thing
    up into the air...
     
  13. ~^Johnny^~

    ~^Johnny^~ Guest

    Troll!

    =plonk!=




    --
    -john
    wide-open at throttle dot info

    ~~~~~~~~
    "Stealing our copyright provisions in the dead of night when no-one
    is looking is piracy. It's not piracy when kids swap music over the
    Internet using Napster..." - Courtney Love
    ~~~~~~~~
     
  14. have you ever injected gunpowder into a capacitor, sealed it up, and then
    heated it?
     
  15. Wasn't that the Presto Hot-Dogger?
    GG
     
  16. Slice

    Slice Guest

    Ever been in a Turkish prison?
     
  17. Lenny

    Lenny Guest

    Yeah I had a friend when we were 16 who screwed around with gunpowder
    and auto aeriels. He blew two fingers off. I remember that. He's
    remembered it too I'm sure. I'll bet you were a real piece of work in
    science class. Missed a few doses of meds, have you? I can't help but
    wonder, do you get a pass to leave the confines of your padded room
    very often? Scary thing to imagine your leaving at all but it just
    reinforces the theory that there's more of "them" walking among us
    than there are locked up. Lenny Stein, Barlen Electronics.
     
  18. Electrolytic caps explode when put in the wrong way because of the
    leakage current heating them up. From what I understand, old
    electrolytic caps can lose their oxide layer if a voltage isn't kept
    across them. When they get turned on suddenly after a few years of not
    being used, they may blow up...

    Apparently, however, one can reform the oxide layer by bringing the
    old caps slowly up to their rated voltage, over a period of days.

    If the current through these reversed caps is limited by some outside
    means, then I guess they may just survive. If they survive, I'm
    guessing that the oxide layer will form in the reverse direction,
    causing them to actually start working properly... However, I would
    guess the capacitance won't match whats written on the outside.

    Anybody who really knows want to comment?

    Regards,
    Bob Monsen
     
  19. Herbert West

    Herbert West Guest

    Yep, I actually did it.

    I also remember back in High School in the 60's. Early on in
    Industrial Arts class, they made the students make "Hot Dog Cookers"
    out of a short piece of wood with two nails in each end. The nails
    were attached to an AC line cord and you skewered the hotdog, plugged
    it in for 30 secs to a minute, and voila!

    Of course, no school would allow such dangerous devices to be made
    nowadays.

    On another "safety" note, one Industrial Arts teacher insisted *all*
    chassis' the students brought in to repair be grounded with a U-ground
    plug. This wreaked havoc with all the AC-DC radios and other
    hot-chassis devices that got fixed in his class. He never could
    understand why so many of them blew fuses after being repaired...
     
  20. Herbert West

    Herbert West Guest


    Not intentionally... I had a lot of nice stupid accidents duing my
    early days employed as an electronics jockey. Loud *BANG* with white
    "popcorn" electrolytic cap innards all over my workbench area...

    Then there were a couple times where PC boards warped too much due to
    heat while being run over the wave solderer. Upon hiting the solder
    fountain, several pounds of molten solder would be running off the
    machine onto the floor before I could hit the panic button...
     
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