Electric Door Bell Circuit Diagram

Doorbell transformers often have two screw terminals.

Electric door bell circuit diagram.

One of these terminals connects via wire to the doorbell chime and the other connects to the doorbell push button. Wiring diagram for a two chime doorbell wiring for two doors is the same as for one with the transformer hardwired to the 120 volt source from a house circuit. The system is wired by running a wire from one side of the transformer to the common terminal of the doorbell unit and the other side through the push buttons at each door and then back to the one ring and the two ring terminals in the unit. Typically the ground wire will be green the neutral wire will be white and the hot or live.

Ground neutral hot wires. This tutorial covers a circuit diagram for door bell using 555 timer ics. The ic has an in built circuitry to produce ding dong sound each time its pin 3 is pulled low. In the above door bell wiring diagram i shown diagram with transformer and if you have a doorbell which have internal step down supply then you can also follow and use the above first diagram method.

Connect the input wires on the transformer to the source circuit using the black to black white to white and ground to green method. This simple and cost effective ding dong electronic doorbell circuit is based on ic 8021 2. In most cases the front door is two rings and the back door is one. Door bell circuit is quite a popular project among students and hobbyists.