If you use these devices to activate something that is out of site you have no idea if "your something" has been activated or not.
My idea it that a second 433 MHz garage door remote can be used at the primary receiver end and when "your something" is activated it activates a "transmit" on the secondary unit. At your end the signal could active a light to indicate all is working all is good.
The question is how to set this up. This is where I require a bit of help.
So when the primary receiver gets a signal and closes its relay, what is the best way to make this activate the secondary transmitter?????

The image it typical of this device


Many Thanks
Greg Pterson

 

You would need to activate the remote fob in some way.
Either a mechanical solution, or break into the fob and use a relay contact to sub for the fob button.
Max.

 

My intention was to BREAK IN and make connection from the relay output to the fob switch using an optocoupler.
Unless someone has a better idea

 

Why the opto coupler?
The relay contact is isolation!
Max.

 

I have a big bag of Sharp PC 817's I need to dispose of humanely.
I think the should do the job with 400 OHM 1 Watt resistor