Zero crossing

Discussion in 'General Electronics Chat' started by alphacat, Oct 19, 2009.

  1. alphacat

    Thread Starter Active Member

    Jun 6, 2009
    I was looking for articles/Information about the effect of unplugging/turning off an apliance without using Zero-crossing, but since i'm new to it, i'm not familiar with related terms. (i'm not sure if EMI or EMC have something to do with it).

    Could you please refer me to text and perhaps tell me the related terms?

  2. russ_hensel

    Distinguished Member

    Jan 11, 2009
    Most switching is not 0 crossing so I would say there is generally no ( adverse ) effect.
  3. hardsoft

    New Member

    Sep 7, 2009
    I won't worry about unplugging. I think it would be almost impossible for a human to perfectly time an unplugging of a device at zero crossing even if they wanted to.

    Usually zero crossing is used for things like ovens when heat is pulsed into a heating element. The element will be turned on and off at the zero crossing to prevent EMI problems.

    Here is a good ap-note by Microchip on designing a low cost range that discussing zero-crossing switching.