How do you switch a wall lamp on a different circuit without changing the switch?

Question

Hi
I would be grateful for help in designing a switch for a wall lamp that is on a different circuit from the switch. The switch is an ordinary wall mounted key switch - I cannot change it to another. I am attaching a diagram of the installation. I would like it to be a simple (cheap) solution without batteries in the controls (230 V supply), I don't need additional control from e.g. remote controls, phone.
Regards
Richard

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bratHanki · Answer

The simplest, cheapest and safest way to do this is with an additional switch in the wall lamp, the so-called dangle. Other methods are not so simple/expensive. Additional information is needed. Will there be another light source from this switch or just the wall lamp?

ryszardwjedrusik · Answer

Thank you for your reply, the dangle is out - my wife will not accept , the switch will only be used for this wall lamp. As for the price, I am able to spend 100 max 200 zł.

David_Serum · Answer

>>21425471 .

There are also options for battery-free switches with a relay, but I personally do not have good experience. Terribly susceptible to interference from mains or RF. I have had lights go on just like that, even at night.

mgim · Answer

. Me neither. And if there is a BTS nearby - it will be a disco. I was setting up at a colleague's house in the cabinet backlights (kitchen) - he bought it himself, I resisted - he wanted it, he got it. After two days he asked how to dismantle it. I put on a string. He had to accept.

David_Serum · Answer

>>21425593 .

I just live a few dozen metres from such a transmitter, I even gave up the doorbell because it was also radio-controlled, plugged into the socket. At night, one would wake up, look through the peephole in the door and there was nothing there. I took the battery out of the transmitter to prove to my wife that it was the receiver that was failing and yes, I'm finally going to connect up the normal model 😆.

bratHanki · Answer

. In that case, controlling the light from another source falls out. Probably also falls out of forging in the walls and finding something ready-made immune to interference. In the old Elektronik Hobby or New Elektronik there was a circuit for sending sound over the 230V system. The way it worked was that there was a generator, probably 220 kHz modulated, e.g. with speech, and this was sent into the network. On the other side was a receiver, detector and audio amplifier. This worked within one phase independently of the circuitry. In this case, the receiver should be fitted with a relay or triac. Something along the lines of an inernet network transmitter.

ryszardwjedrusik · Answer

>>21425646 .I did some research on the web and found a ZAMEL solution: transmitter: RNP-01 and receiver: ROP-01, only I will probably have to change the switch from a bistable switch to a monostable button - unless it will work on a bistable one? Does anyone have experience of such an arrangement, how will it resist interference?

Polon_us · Answer

Just for myself - in the box of this sconce switch, the colleague has both L and N lines?

mgim · Answer

Could have moved the bed into the hallway . I know of a case where WiFi was even boilerplate near the BTS - and the WiFi repeater would just switch on and off.

robbel · Answer

>>21425717 .I've done lighting and roller shutter controls on Zamel's ExTA Free controllers, they've been working without problems for a nice few years. Indeed, I have done on monostable switches.

How do you switch a wall lamp on a different circuit without changing the switch?

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