bells ring generator circuit schematic

Posted on Feb 6, 2014

This circuit generates a dual-tone bells ringing similar to most door-bell units. It can be used in many applications other than door-bell. In the Notes below several options will be given in order to suit different needs. The circuit as shown in the diagram generates a ``Ding-tone`` when P1 is pressed and a ``Dong-tone`` when P1 is released. IC1D is the first-tone frequency generator and IC1F generates the second-tone..

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