This is a simple and very useful article on building a circuit that produces “ding dong” sound using 555 timer. We observe different types of door bells in different houses. They produce different ...

This simple and cost-effective ding dong electronic doorbell circuit is based on IC 8021-2. The IC has an in-built circuitry to produce ding dong sound each time its pin 3 is pulled low. The sound is ...

The reverberating ring of bicycle bells ranks up there with ice cream truck music, in the pantheon of our favorite summer sounds. But is the bicycle bell that you remember still the one you hear ...

Here on the light-rail stop at 12th Street and Jefferson, we’ve been hearing the guttural “honk-honking” and trolley-like “ding-dinging” for a few days during test runs of the new trains, which are ...