[Moved] Do you know sth about Remote LED sensor

[kangyunmei]

It's been 20 years since I'd done anything with electronics but it's like riding a bicycle
I just bought a cheap alarm system that has an LED showing when it's armed on the central unit, which is locked away in a cabinet. We need a remote display for the LED so that we can see the status from outside.
I'd prefer to modify an existing product to save time (doorbell, moisture sensor, etc.)
I think I'll need to clip the LED leads and solder a relay instead. When the relay is closed, send a signal via transmitter to the receiver outside, which has an LED or some other indicator.
The outside unit does not need to be weathertight.

 

[BradtheRad]

Re: Do you know sth about Remote LED sensor

I'd prefer to modify an existing product to save time (doorbell, moisture sensor, etc.)

There is the storebought remote doorbell. It has a pushbutton which you mount next to a door. It contains a battery powered transmitter which sends a radio signal when pushed.
The receiver is plugged into a wall. It makes a chime sound when it receives the radio signal.

For the pushbutton unit you must re-wire it to activate when it detects light from the led in your alarm system. Also install a power supply.

For the chime unit you must wire in an led. Disable the chime.

I suppose the transmitter sends its signal just once per button press. Therefore you may need to contrive a repeating timer to send a signal every few seconds while it detects the alarm system is running.