110v should scaled down linearly to 3.3v,need help

Discussion in 'The Projects Forum' started by dilip42, Sep 10, 2008.

  1. dilip42

    Thread Starter New Member

    Sep 10, 2008
    1
    0
    in my project , i have to measure 110v DC with isolation and the output has to be scaled down to 3.3v. need help.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The best way is use PWM to convert the voltage levels between about 100 volts down to 3.3 or less.
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    For measurement, a simple voltage divider will suffice.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    For the isolation, a step down transformer and a divider may be just the thing.
     
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