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Idea:Mini Two Way Beeper

Wired? Wireless? Distance?

Ken
 
You mean like a two way door bell setup? The circuit below will work as long as SW1 and SW2 are not pushed at the same time:
 

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Pushing both SW1 and SW2 will short circuit the batteries.
 
Why not just use three wires?

Standard mains cable is cheap enough.
 
blueroomelectronics said:
Wouldn't a low voltage AC source on one side work with a little modification?
I'd thought of that but wanted to keep it as simple as possible until we get some feedback as to what the OP really wants.
 

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