(That's the American 120V version but there are similar 220V products.) And, you probably can't build it for the price you can buy it. There are lots of engineering and construction challenges making something that works without re-wiring your house, something that fits into a switch box, works locally or remotely, and looks good. I suggest you buy a "home automation" switch. you need to verify they meet your local codes. There are WiFi light switches you can by that are properly designed and meet some sort of codes. Look up series wiring and parallel wiring and 3-way circuit to get an idea of how to wire a circuit on a bench. If the switch is open, then the relay cannot work. if the relay is open, then the switch cannot work. The link shows what can be done on a bench not installed in your house.īut think about the circuit. You can hire a licensed electrician to open the drywall and remove the existing wall box and replace it with one that allows for low voltage devices to be placed, next to, but separate from, mains wiring. You can buy a light bulb that has WiFi and never touch the house wiring. If you modify your house wiring and it is not 'per code' your insurance company may deny the claim. You can wire your house to allow it to burn down.Īnd what you "MAY" do, as allowed by your insurance company and building code. There is a huge difference of what you 'CAN' do. How are you going to fit all that into a wall utility box? And what is it going to do that is of any use? How about this? How to use 5V Relay to Turn ON and OFF AC Light bulb - Arduino Tutorial - YouTube Something like this arguably could fit the bill, paired with a power supply module:īut a readily available X-10 device may be more appropriate. You certainly can use a relay module to control a light but constructing a sufficiently compact unit to fit into a wall utility box including the relay module, control electronics and power supply is a challenge and then you have to figure out how or from where you propose to control it? Home automation or " domotics" is most certainly a popular topic here. Somewhat more dangerous even than an electric bike. There are many safety and legal concerns about working on your domestic (or commercial) power wiring and it most certainly sounds as if you are not qualified to do so. Your reference to " cutting" the wire of the switch concerns me greatly.
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