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 ...

Halloween is full of goblins, ghouls, jack-o’-lanterns, skeletons, and candy. Lots of candy. To get at that candy, trick-or-treaters might well have to ring your doorbell. Halloween is possibly the ...

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 ...