Tone ringer II

Posted on Sep 25, 2012

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
Click here to download the full size of the above Circuit.

The circuit is designed for nominal 15 volt operation.

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