old phone as doorbell

[winnie]

A more expensive pre-made device:

2PCS RINGING GENERATOR PCR-SIN03V12F20-C IC Power Dsine 3W 12VDC TO 70V 20Hz RED | eBay

New 2PCS PowerDsine/ PCR-SIN03V12F20-C / RINGING GENERATOR 3W 12VDC TO 70V 20HZ. The module has 5 wires RED+BLACK COLOR, 5 WEIRS +CONN. INHIBIT yellow. V+ (12V) red. RNG2 white.

www.ebay.com

 

[ggunn]

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.

 

[Joethemechanic]

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.

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

 

[don_resqcapt19]

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

Like a hand crank megger...you did not have to look at the meter to know the circuit was shorted.

 

[Electromatic]

@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.

 

[winnie]

@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.

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.

 

[hornetd]

View attachment 2581523

Ringing Generator | Surplus Sales of Nebraska

TA182/U Kellogg Switchboard & Supply of Chicago 20 Hz vibrator type ringing generator made Available at Surplus Sales of Nebraska. In-stock and ready to ship today!

www.surplussales.com

Those require 110 volts DC on the input to give you 20 Hz 90 VAC out. I don't now how many amperes of 110 volt DC it needs but you can buy wall warts with some pretty high outputs.

 

[Electromatic]

Knowing that results are rarer than questions on this forum [and in life], I'd like to share my success with the phone ringer to door chime project.
I chose my battles--taking the easy path with a DSine ring module from thEbay and a 12VDC wallwart but spicing it up with different ring times for front and back doors.

Thanks to all who helped.

 

[g-and-h_electric]

VERY NICE!

Nice to see I am not the only one that likes to do this kind of stuff.

One thought.... Why not a rectifier and filter off the existing bell transformer as opposed to the "wall wart"?

Howard