User programmable building talk-back system

Abstract

The invention discloses a user programmable building talk-back system comprising a singlechip, an external E2PROM (Electrically Erasable Programmable Read-Only Memory), a comparator, a keyboard and the like, wherein the singlechip continuously scans the keyboard after recovering and entering the normal working state; the singlechip receives the keyboard room number coding mode and converts a room number into serial signals, and transmits the serial signals to the comparator in an extension by a periphery circuit, so that the serial signals are compared with the prearranged codes in the comparator; if the serial signals are equal to the prearranged codes, control signals are output; a corresponding electronic switch is driven to switch on an audio circuit and a video circuit when the singlechip judges whether the extension exists or has short circuit or open circuit or empty number according to the state of the comparator. The keyboard has the function of inputting room number and also has the function of unlocking by codes and changing the code; the singlechip judges the function to be executed according to the first key input by the keyboard; the E2PROM memories the code of each user; and the code can be changed conveniently and can not lost even when the power is shut down. The user programmable building talk-back system achieves the purpose that each user needs to have a changeable code during the application.

Description

technical field [0001] The invention relates to an intercom system in the technical field of intelligent buildings, in particular to a user-programmable building intercom system. Background technique [0002] The building intercom system is a community networked building intercom system, and a video intercom system is installed at the door of each residence and in the home of the household to realize the identity verification of the visitor and the intercom with the household. The household can remotely open the residential door, so as to effectively Prevent illegal persons from entering residential buildings. [0003] The development of building intercom system has a history of more than ten years. Among them, the digital system is widely used in high-demanding occasions due to its simple wiring and large number of controllable households. Using single-chip control, at present, it is generally possible to control functions such as keyboard processing, intercom, and electro...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art, to provide a user-programmable building intercom system, which can complete the control of functions such as keyboard processing, intercom, and electronically controlled unlocking, and focuses on solving the needs of each household in the application. Practical problems with a modifiable lock combination

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