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110VAC On/Off to 5VDC signal

btaz

Sep 28, 2012
10
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Sep 28, 2012
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10
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.
 

Arouse1973

Adam
Dec 18, 2013
5,177
Joined
Dec 18, 2013
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5,177
What about a simple 110- 5 Volt wall wart? Just for signalling purposes. They are quite cheap and should be relatively safe.
Adam
 

Jouellet

Feb 2, 2015
86
Joined
Feb 2, 2015
Messages
86
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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