Tone ringer II

  

Posted on Sep 25, 2012    7081

The XR-T8205 Tone Ringer is primarily intended as a replacement for the mechanical telephone bell. The device can be.powered directly from telephone ac ringing voltage or from a separate dc supply. An adjustable trigger level is provided with an external resistor.


Tone ringer II  - schematic

The circuit is designed for nominal 15 volt operation.




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