AC step down other method?

Discussion in 'General Electronics Chat' started by victorment, Mar 11, 2011.

  1. victorment

    Thread Starter Member

    Jul 4, 2010
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    0
    Is there another method on stepping down the AC voltage besides of using transformers?
     
  2. Jaguarjoe

    Active Member

    Apr 7, 2010
    770
    90
    Capacitors
     
  3. victorment

    Thread Starter Member

    Jul 4, 2010
    52
    0
    what method do you call it?
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Before you go there, if a thread opens using anything other than transformers for power supplies or other power source uses it is promptly closed on this site. There is no other safe way to use power from the wall, especially for beginners.

    Reactance works well, and doesn't generate heat, so both capacitors and inductors will work. Indeed, inductors are routinely used for fluorescent lights, which act like a dead short when on. The ballest, which is nothing but a big coil, is part of why a fluorescent is so efficient. The new LED light bulbs use capacitors to limit current, but again, that is a taboo subject here at ACC.

    There are also resistors too, as in your basic voltage divider. They can generate heat, sometimes a lot of it.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Capacitors frequently fail as shorted; this is why we don't discuss those types of supplies here, as they are inherently unsafe.

    You must use some type of transformer/coupled inductors to achieve galvanic isolation from the mains power.
     
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