Can I connect a switch connected to the neutral line to 5v microcontroller?

KlausST said:

Hi,

Not clear what you want to achive.
Show us a sketch of your idea.

Klaus

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KlausST said:

Hi,

I assume the AC/DC device gives isolated output..

The the previously asked question is still vaid: Why?

It makes no sense. There is no return path and thus no current flow.
Why a pushbutton?
What´s your idea with the box [??]?

Klaus

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KlausST said:

Hi,

You want the pushbutton at the mains side to cause a logic signal at the microcontroller input?

Then I recommend to use some device with safety isolation: Optcoupler, transformer...

which is better?using optocoupler or transformer?
any schematic describe how can i use opto and transformer to do what i need ?



The shown circuit can´t work.
You always need a reference_signal (usually called GND) for every input signal.
But here the reference is missing.

Mind: you always need at least two lines for a signal.
* One is the signal of interest
* the other is eiter the reference_for_voltage or the return_path_for_currents.

I know that ... thank you ^.^


Klaus

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KlausST said:

Hi,

there are plenty optocoupler circuits and transformer circuits around.
Use the forum search ... this is how a forum should work.

For simply switch ON/OFF you may use a relay....maybe the best solution.

Klaus

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