AC voltage regulation help required plz

Discussion in 'The Projects Forum' started by pices2282, May 23, 2009.

  1. pices2282

    Thread Starter New Member

    May 23, 2009
    1
    0
    Dear expert,
    can any body give me a help in a project.Is there any possibility that a circuit detects three different reading of AC voltages like 180,200,220 and operates a single relay(12vdc) on its behalf but one relay at a time.lz help me
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    You can scale the AC input down with a transformer. Use a diode rectifier and capacitor filter to render the AC from the transformer into DC. A voltage comparator (more like 3) can signal when those voltage levels (scaled down) are reached.

    You statement -
    - is not clear. Can you explain further?
     
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