Doorbell System always safe our home and life. Doorbell improve day by day.Doorbell work wonderfully.
The doorbell consists of a transformer that converts voltages, and a switch that completes the circuit, causing a chime or bell to ring.
A transformer in your attic converts the normal voltage (120 volts) in the majority of house circuits to 24 volts---the typical voltage used by doorbells in modern homes
This simple circuit plus low voltages make doorbells easy to troubleshoot should problems ever arise.
Door bell safe our life and wounderfully. This simple circuit plus low voltages make doorbells easy to troubleshoot should problems ever arise.
For instance, in a buzzer, which the simplest form of doorbell you will find, an electromagnet is in effect used so as to operate a self-interrupting circuit. When the circuit itself is closed, the electromagnet would be magnetized such that it has a pull effect on the contact arm. Thus, this will break the doorbell circuit, effectively shutting off the electromagnet. As a result, the arm falls down and closes this circuit again. Thus, the process repeats.
The buzzing noise of the bell which you hear is actually the sound made by the swiftly moving arm hitting the magnet along with the stationary contact some dozens of times each second. A bell system also works on thus precise idea, except that the moving arm here is attached to an extended clapper.
Visit home.howstuffworks.com for details on how doorbells work.