51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Sunday, October 26th, 2008 at 11:10 | No comments

Categories: Communication Networks

Tags: AT89C51, CAN main line, elevator, PCA82C250, Serial communication, supervisory system

Short Content: Abstract: Based on the CAN bussing technique, take AT89C51 as the core, uses Intel82526 and the PCA82C250 constitution elevator supervisory system, through the master-control unit and the sedan theater box, correspondence between the entrance hall controller's, has completed to the elevator the control, and may carry on the long-distance monitoring. The conflict which appears to the communication in uses the non-destructive arbitration the method solution. Key word: CAN main line; Serial communication; Elevator     In the modern society, the ...

Monday, September 15th, 2008 at 15:39 | No comments

Categories: SCM

Tags: AT89C51, elevator, pronunciation serves, speech chip, The ISD

Short Content: 1 introduction    Along with urban civilising and modernization step's quickening, elevator's service request is also getting higher and higher to the building, the people pursue the intellectualization, user-friendly to ride the ladder environment more and more. In the elevator pronunciation service aspect, is mainly the traditional manual service at present, namely informs the floor which as well as other related service information through the elevator manager the passenger must arrive. This article take the monolithic microcomputer and the ISD speech ...

Monday, September 15th, 2008 at 01:30 | No comments

Categories: SCM

Tags: AT89C51, elevator, pronunciation serves, speech chip, The ISD

Short Content: 1 introduction    Along with urban civilising and modernization step's quickening, elevator's service request is also getting higher and higher to the building, the people pursue the intellectualization, user-friendly to ride the ladder environment more and more. In the elevator pronunciation service aspect, is mainly the traditional manual service at present, namely informs the floor which as well as other related service information through the elevator manager the passenger must arrive. This article take the monolithic microcomputer and the ISD speech ...