No mains allowed?

Discussion in 'Off-Topic' started by Gated, Jul 7, 2010.

  1. Gated

    Thread Starter New Member

    Jul 7, 2010

    Im not too familiar with this website, but how come mains powered circuits or anything that deals with higher voltage is not allowed here?

    Can anyone give some insite and explain as to why?

    Thank you.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    The concern is for so-called transformerless circuits, that seek to get power directly off the mains. Direct mains operation is utterly unsafe. A voltage supply using a transformer is a different case.

    Our concern with higher voltages depends somewhat on the application. Some are less dangerous than others. We have had questions on charging capacitor banks to hundreds of volts for rail guns and homemade tazers.

    The main purpose of the forums is to support hobbyists and persons learning electronics. We have a huge audience of every possible range of interests and abilities. One guiding concern is to not promote dangerous, harmful, or unsafe circuits.
  3. Gated

    Thread Starter New Member

    Jul 7, 2010
    I personally build alot of devices that either run directly on mains (take a solid state tesla coil for instance, some of mine use halfwave rectified mains and that direct mains input is fed to an IGBT/MOSFET bridge.)
    so that bieng said, what is the view on discussion of tesla coils on this site?
    so anything is safe, unless you choose to make it unsafe.
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    That hardly stands up to examination. Do you maintain that a DC supply that uses a capacitor to limit power from the mains is as safe as one that uses a transformer for galvanic isolation?
    That may depend on the design.

    We have no ability to suggest that you rethink the safety of those circuits, but they will certainly never appear on AAC.
  5. bertus


    Apr 5, 2008

    In the forum rules this passage is noted for the safety:

    As this is a "family" forum we like to keep things safe here.
    The visitors are of all levels and ages over here.

  6. sceadwian

    New Member

    Jun 1, 2009
    Gated, there are plenty of high voltage forums out there, this is a general electronics forum. I doubt anyone is gonna slam the door closed on you for circuits that skirt the edges of reasonableness but everything should go in it's place and this forum has CLEARLY stated what it thinks is acceptable for general discussion. When in Rome...

    The operation of a Tesla coil, even a well made one violates the FCC (or local equivalent) laws of most major countries.

    You have to view your posts as if you're giving this information to people that think they know what it means without actually understanding the principals and saftey/legalities.