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dual source input signal to single speaker

jimtxas

May 7, 2012
1
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May 7, 2012
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I have a need to create a relay circuit that allows the following:

2 audio line inputs to 1 audio line input.
For example, 2 input circuits A and B to a relay.
Circuit A has a constant signal that's passed to C (the speaker, or amp input)

when a signal is present on audio Input B, the relay switches to B passing it to C.

We have a security system that relays phone rings, doorbells, etc. We also have a whole house audio system. I simply want to pass on that signal details from the security system to the whole house audio when/if there is a signal present interrupting any other audio.

I know there are whole house audio systems that do this natively but do not want to replace and sure i can do this with some sort of relay setup.

Any recommendations, part numbers that may be needed would be appreciated. i can fire up the soldering iron and put this together with any components required but if there's a device out there that already does this that would be appreciated as well.
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
4,960
Joined
May 8, 2012
Messages
4,960
Unfortunately what you're describing requires a tad more circuitry than a relay.
 
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