question about zero crossing detector circuit

Discussion in 'General Electronics Chat' started by spidermanIIII, Apr 5, 2015.

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  1. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    hi, i have question about how to make zero crossing detector to detect zero crossing for sin wave 220 V RMS without using transformer
     
  2. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
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    this is the circuit i will use
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,148
    1,791
    Your circuit will not work and it would be foolish to attempt it.
     
  4. OBW0549

    Well-Known Member

    Mar 2, 2015
    1,321
    889
    If that's what you propose for a zero-crossing detector circuit, I suggest you make sure you have a fire extinguisher close at hand the first time you plug it in. I guarantee you: there won't be a second time.
     
    Hypatia's Protege likes this.
  5. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    The owners of All About Circuits has elected not to host discussions of transformerless threads.

    This thread is against the AAC forum rules, Terms of Service (ToS).

    Any kind of over-unity devices and systems
    Automotive modifications
    Devices designed to electrocute or shock another person
    LEDs to mains
    Phone jammers
    Rail guns and high-energy projectile devices
    Transformer-less power supplies
    Terms of Service (ToS).

    Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

    Please try to understand the reasons behind this action, and feel free to browse and use the forums.

    You might find answers to your questions in one of these forums:

    http://forum.allaboutcircuits.com/showthread.php?t=54400

    Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ .

    Good luck.
     
  6. bertus

    Administrator

    Apr 5, 2008
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