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110VAC On/Off to 5VDC signal

Discussion in 'General Electronics Discussion' started by btaz, Jan 20, 2015.

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  1. btaz

    btaz

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    Sep 28, 2012
    Any suggestions for an easy circuit that can tell me if 110VAC is on or off by providing a 5V(on) and 0V(off) signal? I don't need this to be a power source only a telemetry signal that will interface with an arduino digital input. So far the easiest thing I can think of is to just use an old wall wart to do the conversion, but if there is a simple circuit I could create then I'd prefer that. Thanks for the suggestions.
     
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
  3. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    What about a simple 110- 5 Volt wall wart? Just for signalling purposes. They are quite cheap and should be relatively safe.
    Adam
     
  4. Jouellet

    Jouellet

    86
    19
    Feb 2, 2015
    Check on the Microchip web site (www.microchip.com).

    A while ago, I found an application note, to detect zero-crossing for generating X-10. By memory, they were simply using a 1 Meg resistor to drive an input... Check on their site to be sure.

    I remember back then that I was surprised on how easy it was !!!
     
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