old phone as doorbell

Somewhere in my garage I have a phone ringer that I used to ring an on stage practical telephone when I was doing community theatre sound design.
 
ggunn said:
Somewhere in my garage I have a phone ringer that I used to ring an on stage practical telephone when I was doing community theatre sound design.
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In high school I had a regular telephone magneto for that. As soon as they picked up the crank got really hard to turn. Big change in impedance
 
@winnie , Are you saying to add a relay to keep the 65V off of the bell wire and buttons since they may not be rated for it?

I may end up just getting one of those pre-fab generators from ebay. By the time I get a rectifier, cap, misc. hardware for connections and mounting, it's probably not much more expensive. We'll see how Rube Goldberg-ish I want to get.
 
Electromatic said:
@winnie , Are you saying to add a relay to keep the 65V off of the bell wire and buttons since they may not be rated for it?

I may end up just getting one of those pre-fab generators from ebay. By the time I get a rectifier, cap, misc. hardware for connections and mounting, it's probably not much more expensive. We'll see how Rube Goldberg-ish I want to get.
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Exactly. I wouldn't want the 65 or 90V AC on the doorbell button, outside where people touch them. All the doorbell buttons that I've seen have severely lacked any sort of isolation.

I just picked the first generator I saw on ebay. I'd hunt a bit. They seem to have both modules that take 12V to power a ringer, and complete boxes with power supplies and buttons.
 
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