For a small extra sum, you can get them with central alarm plugs. But
that doesn't work ifyou have the regular ones already.

What I do is resign myself to the ritual of standing underneath one
until I hear a chirp somewhere else and then move to the next alarm.

But I suppose you could put an SCR and LED and pushbutton in each one so
it would latch the LED upon a chirp, and then you could reset it with
the pushbutton. Or you could use a diode-capacitor-mosfet/darlington
instead so it would reset by itself eventually.

Cheerful regards,

Bob


YES NOPE9 wrote:
> I have a number of alarms in a multi-unit basement crawl space.
> Smoke, CO , Explosive Gas
> When a battery goes dead , it is annoying to find out which device is  
> the problem.
> 
> I am looking for creative ( and cheap ) suggestions about how to make  
> these tweeters distinctive.
> I would be thrilled to come up with a way to report the results via  
> the internet.
> 
> for example:  if I could have a different tone for each one and detect  
> that, I could
> use a smart ethernet adapter ( PIC based of course ) to report the  
> problem.
> Would different length tubes make the beeps distinctive ?
> 
> I guess I could run cheap microphones to each tweeter.
> 
> ( Olin    Please don't give me another award )
> 
> Gus
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