Opto-Coupler as a switch

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Joined: 19 Apr 2018 11:51

Opto-Coupler as a switch

Post by bosulli »


I'm looking for some help and guidance. I'm new to the Arduino world and to the Z-wave / Home Automation world. I have a project that I'm looking to do... It's essentially to trigger the manual switch on my fireplace to light it and to turn it off.

I have a Z-Uno board and a Smartthings hub... I was assuming that arduino would allow me perform the equivalent of a momentary press using some of the output pins, but apparently it's not that simple. I've attached an image to show what I want to achieve, essentially short pins 1 & 3 (with ZERO Voltage going across it, a Dry connection) and secondary to that, short Pins 1, 2 & 3 (again, with ZERO Voltage going across it).

I'm working on the assumption that an Opto-Coupler (which I've never used before) would resolve this but can't get the sketch or hardware layout straight in my head.

If anyone could give some help and guidance I'd really appreciate it.

Thanks for your time!


Diagram of connections
Diagram of connections
Untitled-1.jpg (394.62 KiB) Viewed 2252 times
Posts: 399
Joined: 08 Aug 2016 17:36

Re: Opto-Coupler as a switch

Post by enbemokel »

Hmm, can´t you use the Fibaro universal device? https://manuals.fibaro.com/binary-sensor/
Seems to be easier for me then to program the zuno (I don´t own one). But you have the zuno on hand, so there might be some
hint from other people.
Have fun
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Joined: 30 Jul 2017 19:31

Re: Opto-Coupler as a switch

Post by sega66 »


Zune does not have dry contacts and you will need to purchase an additional relay module for Arduino at 5 volts. This is a very simple task for Z-UNO. If necessary, I will help you. I have z-UNO manages 16 dry contacts and works very well.
https://www.aliexpress.com/item/Free-sh ... 649baLe8Zx
Posts: 377
Joined: 26 Mar 2013 10:35

Re: Opto-Coupler as a switch

Post by michap »

I would take 3V relay modules, if possible, then the logical level will match.

(same source ;) ...)
https://de.aliexpress.com/wholesale?cat ... lay+module

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