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Description: 项目名称：测量放大器
压缩包里面含有设计测量放大器的c源程序（开发环境为keil），目标代码（可直接烧入AT89S52芯片运行），电路原理图等。
源程序含有软件模块：4×4矩阵键盘扫描，led显示，可编程信号衰减。
硬件模块：采用医学生理信号检测仪器的前置放大器的结构，可放大极其微弱信号，譬如毫伏级心电信号。在此基础上加入可编程衰减器。
实现功能：通过按键输入微弱信号的放大倍数，可以相应放大微弱信号。设置倍数时，有四个LED显示倍数，按“千”，“百”“十”，“个”顺序设置，待设置的位会闪烁等待设置。放大倍数为1～1000倍。，譬如可以把1mv的微弱电压放大至1v，误差小于0.3％。用到的芯片有at89s52，ADC7520，opa177,74ls245,74ls138等。纯属原创。
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Size: 1786880 |
Author: 黄灿武 |
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Description: 仪器仪表键盘显示模拟系统，用AT89S52芯片作为系统的CPU，控制系统的按键及显示器部分。用8路同相三态双向总线收发器74LS245芯片驱动LED。4X4矩阵键盘作为系统人机交互的重要部分，用于向单片机应用系统输入数据或控制信息，设计4X4矩阵键盘分别对应键码“0-F”。系统可以实现的基本功能包括开机LCD液晶屏幕显示“大专05电子信息X班XXX毕业设计”信息；按下任意一个按键，LCD液晶屏幕显示相应按键的信息。在基本功能的基础上还增加了一个扩展功能，即增加一个LED数码管同步显示相应键码
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Size: 3439 |
Author: 张存吉 |
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Description: 项目名称：测量放大器
压缩包里面含有设计测量放大器的c源程序（开发环境为keil），目标代码（可直接烧入AT89S52芯片运行），电路原理图等。
源程序含有软件模块：4×4矩阵键盘扫描，led显示，可编程信号衰减。
硬件模块：采用医学生理信号检测仪器的前置放大器的结构，可放大极其微弱信号，譬如毫伏级心电信号。在此基础上加入可编程衰减器。
实现功能：通过按键输入微弱信号的放大倍数，可以相应放大微弱信号。设置倍数时，有四个LED显示倍数，按“千”，“百”“十”，“个”顺序设置，待设置的位会闪烁等待设置。放大倍数为1～1000倍。，譬如可以把1mv的微弱电压放大至1v，误差小于0.3％。用到的芯片有at89s52，ADC7520，opa177,74ls245,74ls138等。纯属原创。
Platform: |
Size: 1786880 |
Author: 黄灿武 |
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Description: 仪器仪表键盘显示模拟系统，用AT89S52芯片作为系统的CPU，控制系统的按键及显示器部分。用8路同相三态双向总线收发器74LS245芯片驱动LED。4X4矩阵键盘作为系统人机交互的重要部分，用于向单片机应用系统输入数据或控制信息，设计4X4矩阵键盘分别对应键码“0-F”。系统可以实现的基本功能包括开机LCD液晶屏幕显示“大专05电子信息X班XXX毕业设计”信息；按下任意一个按键，LCD液晶屏幕显示相应按键的信息。在基本功能的基础上还增加了一个扩展功能，即增加一个LED数码管同步显示相应键码-Show the simulated keyboard instrumentation systems, using AT89S52 chip as a system CPU, system control buttons and display parts. With 8-phase three-state bidirectional bus transceiver 74LS245 chip-driven LED. 4X4 matrix keyboard system as an important part of human-computer interaction, single-chip microcomputer application system used to input data or control information, the design of 4X4 matrix keyboard key code corresponding to
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Size: 3072 |
Author: 张存吉 |
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Description: 双向总线发送器/接收器(3S)
简要说明:
245为三态输出的八组总线收发器,其主要电器特性的典型值如下(不同厂家
具体值有差别)-Two-way bus transmitter/receiver (3S) a brief description: 245 for the three-state output of the eight bus transceiver, the main electrical characteristics of the typical value is as follows (the specific value of different manufacturers there is a difference)
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Size: 81920 |
Author: 李明 |
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Description: 基于89s52的并口显示程序，使用三位数码管，用74ls245做驱动。-89s52 shows the parallel port-based procedures, the use of three digital tube, to do with 74ls245 drive.
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Size: 1024 |
Author: 蒙冠杰 |
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Description: 通过在proteus中操作得知这个程序的作用是：显示图形。
使我了解了数组、变量、子程序等的运用。此程序是通过开关键的控制来实现图形的显示形状，我们主要通过定时器来实现图形的显示间隔，按键的次数来显示索要显示胡和图形，使伙熟悉了P0、P1、P3输入/输出口的功能，以及74LS245芯片胡性能等。
在程序开发中有一项编程风格很重要，那就是命名规则。
一个变量的命名如果恰到好处，能够让人望文知意的话。会让别人在阅读你的代码时变得轻松，更加容易理解。这也在无形中提高了团队合作的效率。
判断是按键还是干扰是非常有用的，它体现了一个系统的抗干扰能力。高低电平在瞬间的变换是很正常的，如果没有这条语句，系统很容易出错。
-Through the process of operation proteus function display graphics.
I understand the array, variable, and use of such procedure. This program is through the open key control to realize that shape, we mainly through the timer to realize that the number of buttons interval, ask to show that hu and graphics, familiar with the gang P0, P1, P3 input/output function, and 74LS245 chip hu performance etc.
In the process of developing a programming style, it s important to naming rules.
A variable naming if properly, can let you know- text. You can let others in reading the code easier, more easy to understand. It also increased in virtually a team of efficiency.
Judgment is a key or interference is very useful, it reflects the anti-interference ability of a system. High level in the instant transformation is very normal, if not this statement, the system is very easy to make a mistake.
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Size: 33792 |
Author: 辛文乐 |
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Description: 简单微型计算机设计
设计一个8088系统，要求接成最大模式。地址锁存器选用74LS373，数据总线收发器用选用74LS245，时钟发生器选用8284，中断控制器选用8259A，总线控制器选用8288。
-Design a simple micro-computer. Design 1. 8088 to design a system, then into the most requested model. Address latch selection 74LS373, selection of data bus transceiver uses 74LS245, optional clock generator 8284, optional interrupt controller 8259A, selected bus controller 8288.
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Size: 241664 |
Author: siren |
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Description: MAX7219+DS1302+74LS245数字钟,内附PROTEUS图！实物以通过-MAX7219+ DS1302+74 LS245 digital clock, enclosing PROTEUS map! In-kind through
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Size: 28672 |
Author: 刘辉 |
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Description: 基于中断控制的声光报警器的设计.采用中断方式，设计一个声光报警器的硬件电路和控制程序。程序运行时，一旦8位开关信号量状态满足设定条件，就触发中断，使发光二级管按规律闪烁，同时扬声器播放一段音乐。
硬件设备包括一台微机、一个MFID微机实验箱、一块T型板，2输入四与门 74ls08、8位总线驱动器 74ls245、LM386A音频放大器、排阻、扬声器各一个，发光二极管8个，470uF电容2个、104电容4个，插线若干。
-Interrupt-based control of sound and light alarm design. Using interrupt mode, designing a sound and light alarm hardware circuits and control procedures. The program is running, once the 8-bit switch signal to set the amount of state to meet the conditions to trigger interrupts, so that light-emitting diode flashes according to the law, while speakers play a piece of music. Hardware includes a computer, a computer simulation, MFID box, a T plate, 2 input 4 and gate 74ls08, 8-bit bus driver 74ls245, LM386A audio amplifier, exclusion, speakers of a light-emitting diode 8, 470uF capacitor 2 a, 104 capacitors 4, plug-line number.
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Size: 138240 |
Author: jane |
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Description: 245为三态输出的八组总线收发器,其主要电器特性的典型值如下(不同厂家
具体值有差别-245 for the eight sets of three-state output bus transceiver, the main electrical characteristics of the typical values are as follows (values are the specific differences between different manufacturers
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Size: 77824 |
Author: 杨龙 |
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Description: 一个用74ls245来扩展矩阵键盘加一个数码管的程序-adfdfseegfg gdfsd ddffs
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Size: 67584 |
Author: 施工在 |
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Description: 本设计采用STC89C52单片机为主控器，实现对出租车的计价设计，输出采8段数码显示管，74LS245芯片和74LS138芯片驱动。本电路设计的计价器不但能实现基本的计价，而且还能根据白天，黑夜来调节单价，同时具有计时功能。-This design uses STC89C52 microcontroller-based controller, the taxi meter design, output adopted 8-segment display tube, 74LS245 chips and 74LS138 chip driver. The circuit design of the meter can not only achieve the basic valuation, but also according to the day and night to adjust the unit price, at the same time has a timer function.
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Size: 1146880 |
Author: 吉尔多 |
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Description: 1、 （1）熟悉8086小模式下基本系统的电路结构：系统电路、总线形成、端口空间分配等；（2）学会8086的运行环境的配置：内存空间、代码空间、时钟频率等；（3） Proteus下仿真调试工具的使用方法；（5）Proteus提供的实验仪器和测试手段的使用方法。
2、 用通用接口芯片实现无条件I/O传送。用一片74LS245做输出端口控制8个LED灯。要求LED灯从上到下依次点亮一次，每个灯亮1s。画出电路图、按要求编写程序，在仿真环境下调试通过。
-1, (1) be familiar with the circuit configuration mode under 8086 small basic systems: System circuit, the bus is formed, port space allocation (2) Institute 8086 operating environment configurations: memory space, code space, the clock frequency (3 ) method using the following Proteus simulation debugging tools (5) test equipment and test instruments provided by the use of Proteus.
2, with a common interface chip unconditionally I/O transfers. 74LS245 do with a piece of output port control 8 LED lights. Requirements LED lights were lit again top to bottom, each light 1s. Draw the circuit, according to the requirements of programming, under simulation debugging environment.
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Size: 94208 |
Author: 艾小麦 |
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Description: 常用器件的中文资料，包括74LS138/74LS245、74LS164、74LS373和ULN2003，希望对英文不是很好的朋友有所帮助。-Chinese data commonly used devices, including 74LS138/74LS245,74LS164,74LS373 and ULN2003, I hope English is not very good to help a friend.
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Size: 489472 |
Author: 梁先生 |
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