Difference between revisions of "Zen Phone Ringer"

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This project has yet to be realized. I'll need some help and advice.
 
This project has yet to be realized. I'll need some help and advice.
 
  
 
Camille (my wife) works from home and finds regular phone ringers disruptive and disturbing. More so on modern electronic phones with synthesized ringers. She encountered this device at an osteopath practitioner's office.
 
Camille (my wife) works from home and finds regular phone ringers disruptive and disturbing. More so on modern electronic phones with synthesized ringers. She encountered this device at an osteopath practitioner's office.
 
  
 
'''The Tibetan Phone Bell and Timer'''
 
'''The Tibetan Phone Bell and Timer'''
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This product is nice, perhaps a bit pricey on our budget at $119.95US. But surely worth the features if you're not inclined to build one. But could we make our own?
 
This product is nice, perhaps a bit pricey on our budget at $119.95US. But surely worth the features if you're not inclined to build one. But could we make our own?
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 +
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=== Comments would be helpful and appreciated ===
 +
 +
[mailto:lab@artengine.ca?subject=Zen%20Phone%20Ringer ModLab Public List < lab@artengine.ca >]<br>
 +
[mailto:mlecha@artengine.ca?subject=Zen%20Phone%20Ringer Personal Address < mlecha@artengine.ca >]
 +
  
 
=== How phones work ===
 
=== How phones work ===
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=== Circuit Diagrams for ringers on the web? ===
 
=== Circuit Diagrams for ringers on the web? ===
  
Time to hit Google.
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Article on ringer circuits with circuit diagrams<br>
 +
http://www.epanorama.net/circuits/telephone_ringer.html
  
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Telephone Ringer Diagram<br>
 +
http://www.extremecircuits.net/2010/05/telephone-ringer.html
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 +
High Voltage Ringer<br>
 +
http://www.sparkfun.com/tutorials/50
 +
 +
YouTube Phone Ringer Circuit<br>
 +
http://www.youtube.com/watch?feature=player_embedded&v=pZcdLNMK1c4
 +
 +
YouTube Telephone Ringer Circuit<br>
 +
http://www.jakeselectronics.net/pro-telephoneringdetector.php
  
 
=== Potentially Useful Parts ===
 
=== Potentially Useful Parts ===
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 +
==== Clock Bell ====
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http://www.norkro.com/store/images/BELL%201.38.jpg
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http://www.norkro.com/store/1-3-8-clock-bell/
  
 
==== Single Gong Ringer ====
 
==== Single Gong Ringer ====
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Could this 'single gong ringer' be modified? Could it be modified to strike the gong only once per ring cycle?
 
Could this 'single gong ringer' be modified? Could it be modified to strike the gong only once per ring cycle?
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==== Mechanical striker ====
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What kind of mechanical strikers are available on the web?
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 +
==== Selonoid Hammer ====
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 +
Nicolas Bernier had a piece at [http://artengine.ca/programming/2012/electricfields/opening-en.php Electric Fields 2012] that used hammers on tuning forks. I've contacted him for a source.
 +
https://vimeo.com/48493242
  
 
==== Arduino ====
 
==== Arduino ====
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Would an arduino be appropriate to drive some hardware? Based on my knowledge of that platform it could work well. But why use an arduino when we can design a circuit, powered by the phone line?
 
Would an arduino be appropriate to drive some hardware? Based on my knowledge of that platform it could work well. But why use an arduino when we can design a circuit, powered by the phone line?
  
 +
The arduino outputs such a low voltage that we'd need to amplify the signal. We'd have to design a ringer detection circuit that reduces the voltage of the standard telephone line to an amount that the arduino can handle.
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Here's a project that uses an arduino to power the ringer<br>
 +
http://electronics.stackexchange.com/questions/5531/wiring-up-old-phone-ringer-to-arduino
  
 
=== To-Do ===
 
=== To-Do ===
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''' Does ModLab have a power suppply that can provide the ringer voltage for testing? '''
 
''' Does ModLab have a power suppply that can provide the ringer voltage for testing? '''
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 +
No answer to that one, but we could build a ringer circuit above to create the ring signal<br>
 +
http://www.youtube.com/watch?feature=player_embedded&v=pZcdLNMK1c4
  
 
The telephone company sends a ringing signal which is an AC waveform.  Although the common frequency used in the United States is 20 HZ, it can be any frequency between 15 and 68 Hz.  Most of the  world uses  frequencies  between  20 and 40 Hz.  The  voltage  at  the subscribers  end depends upon loop length and number  of  ringers attached to the line; it could be between 40 and 150 Volts.  Note that  ringing voltage can be hazardous; when you're working on  a phone line, be sure at least one telephone on the line is off the hook  (in  use); if any are not, take high  voltage  precautions.  The  telephone  company may or may not remove the 48  VDC  during ringing;  as  far  as you're concerned, this  is  not  important.  Don't take chances.  
 
The telephone company sends a ringing signal which is an AC waveform.  Although the common frequency used in the United States is 20 HZ, it can be any frequency between 15 and 68 Hz.  Most of the  world uses  frequencies  between  20 and 40 Hz.  The  voltage  at  the subscribers  end depends upon loop length and number  of  ringers attached to the line; it could be between 40 and 150 Volts.  Note that  ringing voltage can be hazardous; when you're working on  a phone line, be sure at least one telephone on the line is off the hook  (in  use); if any are not, take high  voltage  precautions.  The  telephone  company may or may not remove the 48  VDC  during ringing;  as  far  as you're concerned, this  is  not  important.  Don't take chances.  
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When the telephone company uses the ringer to test the line, it  sends  a  low-voltage, low frequency  signal  down  the  line  
 
When the telephone company uses the ringer to test the line, it  sends  a  low-voltage, low frequency  signal  down  the  line  
 
(usually  2 Volts at 10 Hz) to test for continuity.  The  company keeps records of the expected signals on your line.  This is  how it  can  tell  you have added equipment to your  line.  If  your telephone has had its ringer disconnected, the telephone  company cannot detect its presence on the line.
 
(usually  2 Volts at 10 Hz) to test for continuity.  The  company keeps records of the expected signals on your line.  This is  how it  can  tell  you have added equipment to your  line.  If  your telephone has had its ringer disconnected, the telephone  company cannot detect its presence on the line.
 
 
 
=== Comments would be helpful and appreciated ===
 
 
[mailto:lab@artengine.ca?subject=Zen%20Phone%20Ringer ModLab Public List < lab@artengine.ca >.]<br>
 
[mailto:mlecha@artengine.ca?subject=Zen%20Phone%20Ringer Personal Address < mlecha@artengine.ca >]
 

Latest revision as of 22:25, 5 January 2013

This project has yet to be realized. I'll need some help and advice.

Camille (my wife) works from home and finds regular phone ringers disruptive and disturbing. More so on modern electronic phones with synthesized ringers. She encountered this device at an osteopath practitioner's office.

The Tibetan Phone Bell and Timer

photo1.jpg
Tibetan Phone Bell and Timer

This product is nice, perhaps a bit pricey on our budget at $119.95US. But surely worth the features if you're not inclined to build one. But could we make our own?


Comments would be helpful and appreciated

ModLab Public List < lab@artengine.ca >
Personal Address < mlecha@artengine.ca >


How phones work

Here's a great tutorial on how phones work. This is going to be a really helpful article and reference: Understanding Telephones


Circuit Diagrams for ringers on the web?

Article on ringer circuits with circuit diagrams
http://www.epanorama.net/circuits/telephone_ringer.html

Telephone Ringer Diagram
http://www.extremecircuits.net/2010/05/telephone-ringer.html

High Voltage Ringer
http://www.sparkfun.com/tutorials/50

YouTube Phone Ringer Circuit
http://www.youtube.com/watch?feature=player_embedded&v=pZcdLNMK1c4

YouTube Telephone Ringer Circuit
http://www.jakeselectronics.net/pro-telephoneringdetector.php

Potentially Useful Parts

Clock Bell

BELL%201.38.jpg

http://www.norkro.com/store/1-3-8-clock-bell/

Single Gong Ringer

Zen-ringer-single-gong-ringer.jpg
http://store.frillfreephones.com/siriinshtoal.html

Could this 'single gong ringer' be modified? Could it be modified to strike the gong only once per ring cycle?

Mechanical striker

What kind of mechanical strikers are available on the web?

Selonoid Hammer

Nicolas Bernier had a piece at Electric Fields 2012 that used hammers on tuning forks. I've contacted him for a source. https://vimeo.com/48493242

Arduino

Would an arduino be appropriate to drive some hardware? Based on my knowledge of that platform it could work well. But why use an arduino when we can design a circuit, powered by the phone line?

The arduino outputs such a low voltage that we'd need to amplify the signal. We'd have to design a ringer detection circuit that reduces the voltage of the standard telephone line to an amount that the arduino can handle.

Here's a project that uses an arduino to power the ringer
http://electronics.stackexchange.com/questions/5531/wiring-up-old-phone-ringer-to-arduino

To-Do

Time to read the "How phones work" guide above first.


Open Questions

Does ModLab have a power suppply that can provide the ringer voltage for testing?

No answer to that one, but we could build a ringer circuit above to create the ring signal
http://www.youtube.com/watch?feature=player_embedded&v=pZcdLNMK1c4

The telephone company sends a ringing signal which is an AC waveform. Although the common frequency used in the United States is 20 HZ, it can be any frequency between 15 and 68 Hz. Most of the world uses frequencies between 20 and 40 Hz. The voltage at the subscribers end depends upon loop length and number of ringers attached to the line; it could be between 40 and 150 Volts. Note that ringing voltage can be hazardous; when you're working on a phone line, be sure at least one telephone on the line is off the hook (in use); if any are not, take high voltage precautions. The telephone company may or may not remove the 48 VDC during ringing; as far as you're concerned, this is not important. Don't take chances.

Ringers are isolated from the DC of the phone line by a capacitor. Gong ringers in the United States use a 0.47 uF capacitor. Warbling ringers in the United States generally use a 1.0 uF capacitor. Telephone companies in other parts of the world use capacitors between 0.2 and 2.0 uF. The paper capacitors of the past have been replaced almost exclusively with capacitors made of Mylar film. Their voltage rating is always 250 Volts.

The capacitor and ringer coil, or Zeners in a warbling ringer, constitute a resonant circuit. When your phone is hung up ("on hook") the ringer is across the line; if you have turned off the ringer you have merely silenced the transducer, not removed the circuit from the line.

When the telephone company uses the ringer to test the line, it sends a low-voltage, low frequency signal down the line (usually 2 Volts at 10 Hz) to test for continuity. The company keeps records of the expected signals on your line. This is how it can tell you have added equipment to your line. If your telephone has had its ringer disconnected, the telephone company cannot detect its presence on the line.