Digitemp Jr. is a device that is designed to measure and report ambient temperature. When connected to an RS-232 port on any PC, it will periodically measure and report in ASCII form the ambient temperature in degrees Celsius. These temperature readings can be monitored with any terminal program. If the terminal program supports capture to disk, the temperature readings can be saved to disk for further analysis with a spreadsheet program or other data analysis tool. The simple ASCII output format of Digitemp Jr. makes it relatively easy to write custom software for receiving, recording, and analyzing ambient temperature data. Best of all, Digitemp Jr. requires no external power supplies or batteries. It is powered directly by the RS-232 port.
上傳時(shí)間： 2013-10-20
上傳用戶：Maple
在深入了解Flash存儲(chǔ)器的基礎(chǔ)上，采用單片機(jī)自動(dòng)檢測存儲(chǔ)器無效塊。主要通過讀取每一塊的第1、第2頁內(nèi)容，判斷該塊的好壞，并給出具體的實(shí)現(xiàn)過程，以及部分關(guān)鍵的電路原理圖和C語言程序代碼。該設(shè)計(jì)最終實(shí)現(xiàn)單片機(jī)自動(dòng)檢測Flash壞塊的功能，并通過讀取ID號(hào)檢測Flash的性能，同時(shí)該設(shè)計(jì)能夠存儲(chǔ)和讀取1GB數(shù)據(jù)。 Abstract: On the basis of in-depth understanding the Flash chips，this paper designs a new program which using the SCM to detect the invalid block.Mainly through reading the data of the first and second page to detect the invalid block.Specific implementation procedure was given,and the key circuit schematic diagram and C language program code was introduced.This design achieved the function of using the MCU checks the invalid block finally，and increased the function by reading the ID number of Flash to get the performance of the memory.And the design also can write and read1GB data
標(biāo)簽： Flash 單片機(jī) 存儲(chǔ)器 自動(dòng)檢測
上傳時(shí)間： 2013-10-25
上傳用戶：taozhihua1314
詳細(xì)介紹工控軟件組態(tài)王與單片機(jī)多機(jī)串口通訊的設(shè)計(jì)原理。分析組態(tài)王提供的直接與單片機(jī)串口通信方法的優(yōu)點(diǎn)，給出系統(tǒng)基于RS-485總線傳輸?shù)慕涌陔娐吩韴D。根據(jù)組態(tài)王提供的通訊協(xié)議和單片機(jī)多機(jī)串口通訊的原理，給出程序設(shè)計(jì)流程與思路。 Abstract: In this paper，the design principle of communication between multi-SCM and KingView by serial ports is described in detail.We analysis the advantage of method supplied by KingView,by which KingView can communicate with serial ports of SCM directly，and provide the system’s interface circuit based on the RS-485transmission line.We provide flow diagram of programming and thinking on the basis of communication protocol supplied by KingView and principle of communication among multi-SCM through serial ports.
標(biāo)簽： 工控軟件 單片機(jī) 串口通訊 多機(jī)
上傳時(shí)間： 2013-12-19
上傳用戶：tecman
實(shí)時(shí)時(shí)鐘是微機(jī)保護(hù)裝置的重要部件，在討論P(yáng)CF8583結(jié)構(gòu)與功能的基礎(chǔ)上，提出采用dsPIC33F系列微處理器與串行I2C時(shí)鐘PCF8583的接口設(shè)計(jì)方案，給出了相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡單，可靠性高，開發(fā)周期短，具有一定的實(shí)用與參考價(jià)值。所設(shè)計(jì)的微機(jī)保護(hù)裝置已投入現(xiàn)場運(yùn)行，效果良好。 Abstract: Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
標(biāo)簽： 8583 PCF 串行時(shí)鐘 中的應(yīng)用
上傳時(shí)間： 2013-11-18
上傳用戶：Thuan
介紹一種采用單片機(jī)技術(shù)和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對(duì)整個(gè)系統(tǒng)框架進(jìn)行說明，然后介紹主要功能模塊的設(shè)計(jì)，給出了各模塊的原理圖。重點(diǎn)描述了基站器件EM4095的性能參數(shù)和功能原理，最后描述了該系統(tǒng)的主程序流程圖。 Abstract: In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At first，the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last，the main software flow is given
標(biāo)簽： 4095 RFID EM 單片機(jī)
上傳時(shí)間： 2013-10-18
上傳用戶：windypsm
Mega16是一款采用先進(jìn)RISC精簡指令，內(nèi)置A/D的8位單片機(jī)，可支持低電壓聯(lián)機(jī) Flash和EEPROM 寫入功能；同時(shí)還支持 Basic和C 等高級(jí)語言編程。用它設(shè)計(jì)電子時(shí)鐘不僅成本低，硬件簡單，而且很容易實(shí)現(xiàn)系統(tǒng)移植。介紹了如何利用AVR系列單片機(jī)Mega16及1602字符液晶來設(shè)計(jì)電子時(shí)鐘的方法，同時(shí)給出了相應(yīng)的電路原理及部分語言程序。 Abstract: ?Mega16 is a high-performance, low power consumption, the use of advanced RISC concise instructions, built-in A/D 8-bit microcontrollers, the on-line support for low-voltage Flash, EEPROM write function. Except Mega16 also support the Basic, C, and other high-level language programming.The electronic clock which is deisgned by Mega16 is not only low-cost, simple hardware, but easy to achieve system migration.The design method of electrioic clock based on the AVR Mega16 and character LCD1602 is introduced in this paper,and the corresponding circuit electrionic and some language program are given.
上傳時(shí)間： 2014-12-27
上傳用戶：zl5712176
介紹了一種基于AT89S52微處理器、鍵控顯示模式、多漢字顯示的顯示模塊設(shè)計(jì)方法。對(duì)AT89S52的內(nèi)部功能及使用高128字節(jié)RAM時(shí)的尋址方式進(jìn)行說明。給出了四漢字顯示模塊的硬件電路原理圖、主程序流程圖以及中斷顯示流程圖。 Abstract: The design method of display module base on the AT89S52 microcontroller,display mode controlled by keyboard and? showing several Chinese characterses are introduced in the paper.The internal function and the addressing mode for the high 128B RAM of the AT89S52 are explained.The basic circuit diagram,the main program flow chart and the display interrupt flow chart of four Chinese characterses display module are also given.
上傳時(shí)間： 2014-01-23
上傳用戶：咔樂塢
針對(duì)材料試驗(yàn)機(jī)等設(shè)備中要求測量或控制材料拉伸或壓縮的位移，一般采用光電軸角編碼器檢測位置信號(hào)，輸出正交編碼脈沖信號(hào)。若采用其他方法檢測位置信號(hào)，必然導(dǎo)致電路設(shè)計(jì)復(fù)雜，可靠性降低。因此，提出一種基于LS7266R1的電子式萬能材料試驗(yàn)機(jī)設(shè)計(jì)方案。給出了試驗(yàn)機(jī)中的控制器工作原理，LS7266R1與單片機(jī)的接口硬件設(shè)計(jì)，以及主程序軟件流程圖。巧妙地把力量傳感器，位移傳感器等機(jī)械運(yùn)動(dòng)狀態(tài)的壓力或拉力以及位置坐標(biāo)，變成了電壓信號(hào)和電脈沖數(shù)字信號(hào)，供A/D測量和LS7266R1計(jì)數(shù)，從而實(shí)現(xiàn)了獨(dú)立完成材料試驗(yàn)控制或通過PC機(jī)串口命令完成材料試驗(yàn)控制。 Abstract: Aiming at the requirement that the displacement of the tension and compression always be tested and controlled in the equipement such as material testing machine. The position signal was tested by photoelectric axial angle coder. Therefore， the paper proposes the design of electronic universal testing machine design based on LS7266R1. If the position signal detected by other methods， will inevitably lead to the circuit design complexity， reliability decreased. The work theory of the controller， the hardware interface design between LS7266R1 and single chip， and the flow chart of main program， are presented in this paper. The signal of the compression or tension power and displacement at working， which tested by power sensor and displacement sensor especially， is changed into electric voltage and electric pulse numerical signals. And these signals can be tested by A/D and counted by LS7266R1. Finally the test of the material properties can be controlled by itself， or controlled by the COM command of PC.
上傳時(shí)間： 2013-11-02
上傳用戶：yl1140vista
介紹了電力操作電源與智能電池巡檢系統(tǒng)的特點(diǎn)，給出了一種基于超低功耗單片機(jī)MSP430 F149針對(duì)中小型變電站自動(dòng)化運(yùn)行的專用設(shè)備的基本設(shè)計(jì)原理及實(shí)現(xiàn)方法，最后給出了詳細(xì)硬件構(gòu)成和軟件實(shí)現(xiàn)。該系統(tǒng)能滿足中小型變電站安全、可靠、自動(dòng)運(yùn)行的要求，并通過與上位機(jī)的串行通信實(shí)現(xiàn)變電站的遠(yuǎn)程管理和控制。 Abstract: The characters of the intelligent battery data logging system of the electric operation power are introduced.The basic design principle and the implemented methods of the special equipment which only designed for the middle or small transformer substation based on MSP430F149 are prescribed. Finally, the hardware block diagram and the software flow chart are also given. The function that the system finally needs to realize can basically meet with the middle or small transformer substation’s satisfy, reliably,and automatic running.And it can also realize the transformer substation long-distance management and control by serial communicating with the host computer.
上傳時(shí)間： 2013-11-25
上傳用戶：黃華強(qiáng)
將現(xiàn)行的供暖計(jì)費(fèi)方式由按建筑面積計(jì)費(fèi)變?yōu)榘聪牡臒崮苡?jì)費(fèi)是供暖計(jì)費(fèi)方式發(fā)展趨勢，為了滿足這一計(jì)費(fèi)方式變化的需要，設(shè)計(jì)了基于IC卡的預(yù)付費(fèi)式新型供暖計(jì)費(fèi)系統(tǒng)，通過測量用戶采暖系統(tǒng)進(jìn)出口的溫度和流量，計(jì)算用戶消耗的熱能，利用IC卡記錄用戶預(yù)付費(fèi)的金額和當(dāng)年熱能的單價(jià)，根據(jù)熱能消耗和當(dāng)年熱能的單價(jià)計(jì)算用戶采暖費(fèi)，根據(jù)實(shí)際發(fā)生的供暖費(fèi)用和預(yù)付費(fèi)金額控制供暖的開停，這一計(jì)費(fèi)方式的變化使供暖計(jì)費(fèi)更趨合理。 Abstract: It is trend that the mode of heat charging is changed from billing by building area to by thermal energy. In order to meet the needs of heat charging mode changing， a new system of heat charging based on IC card is proposed. The user?蒺s energy consumption is calculated by measuring the user inlet and outlet temperature and flow，using the IC card to record the prepaid amount and the current price of heat. The user?蒺s heating costs is calculated according to energy consumption and current price， according to actual heating costs and prepaid amount，the system controls the heating opening or stopping. It is more reasonable that calculated heating costs by user heat consumption
標(biāo)簽： IC卡 計(jì)費(fèi) 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-10-14
上傳用戶：大融融rr
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