Door bell circuit

Back in the era of land lines, a parrot learned to initiate the sound of the phone ringing followed by calling the teenager in the house. I'm amazed the teenager didn't roast the parrot after running down the stairs a few times...
 
It's not about the maintenance it's about the installation! (Want to spend 5-6 hours running wires around a 100 year old house or put up a wireless and replace the battery every year when you check the smoke detectors.)
Quite right, that man !!
 
It's not about the maintenance it's about the installation! (Want to spend 5-6 hours running wires around a 100 year old house or put up a wireless and replace the battery every year when you check the smoke detectors.)
I've never done that. Never in my life have I ever retrofitted a doorbell. That would be dumb when battery options exist that you can just change the battery in once every couple of years.
 
I've never done that. Never in my life have I ever retrofitted a doorbell. That would be dumb when battery options exist that you can just change the battery in once every couple of years.
And my doorbell is not a retrofit.
 
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