Hi there, I will start building a new house in some months and I have started to think about how can I automate things.
First point are the lights. I always thought the way would be to have touch sensors or push buttons working at 5v that would trigger the relays attached to the arduino. So I started looking for wall touch sensors working at 5v but I could not find anything. Almost all are AC. So am I doing something wrong? Does it not make sense? Of course I could go for the push buttons as those work the same for AC and DC but the touch sensors look fancier and even more if they have a LED
So sumarizing, I am looking for this: https://goo.gl/images/GvwmW4 but with this hardware: https://goo.gl/images/iQ9Ddj
Thanks for your help.
Of course I could go for the push buttons as those work the same for AC and DC but the touch sensors look fancier and even more if they have a LED
Touch sensors may look fancier but push buttons may also include an LED and most important: they give you haptic feedback. I was working in a house where all light switches where made by the kind of KNX touch buttons you linked to. You almost get crazy with them because they don't always recognize your touch and you have absolutely no feedback from the button if it got hit or not.
This link shows you the kind of buttons I'm using in my house: Feller - Online-Katalog
These include LEDs which you can control by the Arduino too. And although the spec says 12-48V DC both the LED and the button work great with 5V.
Hey, thanks for your feedback. Good to know.
I have bought one of these:
Even not being exactly what I am looking for, I am going to try and hack it to make it work in 5V. But I don't think I will end doing this for two dozen switches. So I'll go for your recommendation.
That part looks like it's drawing it's power directly from the 240VAC which could make it very difficult to power it with 5V without having the inside schematics. But it might be an interesting hack object. Good luck.
PS: Before hacking it, install it in your current flat and let your family test it for a month or so. I'd bet that they won't like the missing haptic feedback.
Why not just buy a commercial system - getting cheaper all the time and work very well , have smart phone apps etc.