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English: Pictorial diagram of electric doorbell wiring with a dual-solenoid chime, front door pushbutton switch and back door pushbutton switch. Date 13 November 2013, 20:03:54
William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1] A precursor to the electric doorbell, specifically a bell that could be rung at a distance via an electric wire, was invented by ...
A door phone or door bell phone is a set of electrical and electronic elements used to handle communication between a resident in a house, apartment or villa and a guest outside. The device can also lock or unlock the door it has been configured to work with. Door phones have been used across a variety of commercial and residential buildings ...
One of the first was the oscillating electric wire invented by James Marsh in 1824. [6] [5] This consisted of a wire pendulum dipping into a mercury trough, suspended between the poles of an electromagnet. When current was passed through the wire, the force of the magnet made the wire swing sideways, out of the mercury, which broke the current ...
An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...
An auxiliary alert device (such as a doorbell, chime, or tone generator) can be connected to the door phone controller so that it will ring when the door phone button is pushed. An optional electric strike plate release can be obtained for door operation to permit the caller to unlock the door by entering a preset code on the door phone keypad.