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Description: 本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。-the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D / A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current / voltage changes, the A / D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the
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Size: 197253 |
Author: DAI |
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Description: 本文档是基于AT89S52单片机，通过C语言编程实现了对测温电路的控制，其中包括对加热继电器的控制，对A/D转换的控制以及数码管显示。-this document is based on SCM AT89S52 through C programming language of the temperature control circuit. including the heating Relay control of the A / D conversion and control LED display.
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Size: 45939 |
Author: syb |
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Description: 以 AT89S52为核心 ,通过 A/D、D/A转换和 V/ I转换及独特的算法实现高精度的电流控制 ,电流输出范围为 20～
2000mA的数控直流电流源。该电流源具有电流可预置 , lmA步进 ,同时显示给定值和实测值等功能。-to AT89S52 as the core and, through A / D, D / A conversion and V / I and unique conversion algorithm, high-precision current control, Current output range of 20 ~ 2000mA NC DC current source. The current source can be preset with current, lmA stepper, also showed a given value and the function of the measured value.
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Size: 180719 |
Author: 万红军 |
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Description: 数控电源程序 配合AT89S52 D/A A/D子程序
Platform: |
Size: 3547 |
Author: 陶子平 |
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Description: 一个简单的C51亮灯的程序，
PELCO D 2400检测。
9J1普通解码器程序代码
单片机AT89S51或AT89S52
包含头文件，单片机SFR定义信息
非常实用
Platform: |
Size: 3280 |
Author: reyman |
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Description: 本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。-the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D/A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current/voltage changes, the A/D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the
Platform: |
Size: 196608 |
Author: |
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Description: 本文档是基于AT89S52单片机，通过C语言编程实现了对测温电路的控制，其中包括对加热继电器的控制，对A/D转换的控制以及数码管显示。-this document is based on SCM AT89S52 through C programming language of the temperature control circuit. including the heating Relay control of the A/D conversion and control LED display.
Platform: |
Size: 46080 |
Author: syb |
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Description: 以 AT89S52为核心 ,通过 A/D、D/A转换和 V/ I转换及独特的算法实现高精度的电流控制 ,电流输出范围为 20～
2000mA的数控直流电流源。该电流源具有电流可预置 , lmA步进 ,同时显示给定值和实测值等功能。-to AT89S52 as the core and, through A/D, D/A conversion and V/I and unique conversion algorithm, high-precision current control, Current output range of 20 ~ 2000mA NC DC current source. The current source can be preset with current, lmA stepper, also showed a given value and the function of the measured value.
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Size: 180224 |
Author: 万红军 |
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Description: 数控电源程序 配合AT89S52 D/A A/D子程序-NC power program with AT89S52 D/AA/D Subroutine
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Size: 3072 |
Author: 陶子平 |
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Description: 本人收集的AT89S52单片机的中文资料，可能AT89系列人们使用太少，所以资料很难找，传上共享-I collected information AT89S52 MCU Chinese may AT89 series of people use too little, so information was hard to find, share Chuan
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Size: 311296 |
Author: zly |
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Description: 一个简单的C51亮灯的程序，
PELCO D 2400检测。
9J1普通解码器程序代码
单片机AT89S51或AT89S52
包含头文件，单片机SFR定义信息
非常实用-C51 a simple switch-on procedure, PELCO D 2400 testing. 9J1 ordinary single-chip decoder AT89S51 code or AT89S52 contains header files, microcontroller SFR very useful definition of information
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Size: 3072 |
Author: reyman |
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Description: 本人非常支持单片机设计DIY 在这里再次献出小弟的一点心意,下面是使用AT89S52驱动74HC4015,实现1选择8的数据通道切换器,可以在不8个通道出加上不同大小的电阻.可以用来单声道音量的大小控制.
下面作品图是小弟设计的廉价的 基于单片机的毕业设计 ,它还使用了无线接收发送模块,通过使用手上的遥控器能控制音量的大小,还加了一块HCF4052用于输入音道的选择,支持思路音频信号的输入,一路音频信号的输出:
-I very much support the single-chip design DIY here again gave a little boy s mind is to use the following AT89S52 drive 74HC4015, to achieve a choice of 8 switches the data channel, you can not add the 8-channel resistance of different sizes. Can used to the size of mono volume control. The following work plan is designed小弟cheap graduation based on single-chip design, it uses the wireless receiver send module, through the use of the hands of the remote control can control the volume size, but also Add a piece of HCF4052 Road for the importation of sound choices, to support the idea of audio signal input, the output audio signal all the way:
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Size: 84992 |
Author: 彬 |
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Description: 本系统采用单片机 AT89S52 为控制核心，实现电子秤的基本控制功能。系统的硬件部分包括最小系统板，数据采集、人机交互界面三大部分。最小系统部分主要是扩展了外部数据存储器，数据采集部分由压力传感器、信号的前级处理和 A/D 转换部分组成。人机界面部分为键盘输入 ， 128 64 点阵式液晶显示，可以直观的显示中文，使用方便。-The system uses a single-chip AT89S52 for the control of the core, the realization of the electronic scale of the basic control functions. System hardware components, including the smallest system board, data acquisition, the three most interactive interface. The smallest parts of the system is mainly the expansion of the external data memory, data acquisition in part by the pressure sensors, signal pre-processing and A/D conversion parts. Part of man-machine interface for keyboard input, 12,864 dot-matrix liquid crystal display can show the Chinese intuitive and easy to use.
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Size: 190464 |
Author: killer |
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Description: 本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新。-Voltage measurement points of the system and the output of two major signals, voltage measurement circuitry to simulate the main part, with the amplification module, A/D conversion module, display module through Sunplus Single-chip data processing, in the range of error allowed shows the value of measuring voltage. Signal generated by direct digital frequency synthesizer for the core of the DDS chip AT89S52 after the internal control standards so that the output sine wave shape, frequency of use of pre-programming, step to the output voltage adjustable frequency step. Debugging and measurement, through the completion of the basic part of the topic and all the requirements to play a part and have their own innovation.
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Size: 1024 |
Author: bo |
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Description: 以AT89S52为核心，对采集的模拟信号利用A/D转换为数字信号并送到单片机进行运算处理并通过显示电路显示结果。本系统具有自动轮流显示8个通道模拟信号的数值并可以通过按键切换通道的功能。-AT89S52 as the core in the acquisition of analog signals using A/D conversion and digital signal processing to carry out single-chip and the result will be displayed through the display circuit. Automatic rotation of the system show that 8-channel analog signal value and can function button to switch channels.
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Size: 105472 |
Author: 董林 |
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Description: 本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器(Direct Digital Frequency Synthesis,简称DDS或DDFS)为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新-This system consists of the parts of the voltage measurement and the signal generation output. The voltage measurement mainly focuses on analog electric circuit, with using amplifier module, A/D conversion module and displaying module. In the certain range where errors are allowed to deal with data through SPCE061A microcontroller, the signal generation regards direct Digital Frequency, or DDS/DDFS as the centre, which is controlled by AT89S52 to output sine waveform. Then it can set up frequency and step to adjust the step of voltage output frequency. Through to debugging and measure the system performs the basic and expanding demands .we have some addition innovation.
Keywords：SPCE061A ，AT89S52 ，millivoltmeter , DDS
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Size: 589824 |
Author: 杨隆 |
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Description: 本单片机系统采用AT89S52控制，整个硬件系统由A/D、D/A转换、LED显示、键盘、串行通信等模块组成。-ok
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Size: 788480 |
Author: 杨蓉 |
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Description: 本系统采用双积分电路将对直流电压的直接测量，利用模拟开关实现对量程的无触点切换。A/D转换器部分采用普通元器件构成模拟部分，利用AT89S52单片机借助软件实现数字计数显示功能，同时采用AT89S52单片机编程实现直流电压表量程的自动转换、自动校零、和液晶显示等功能。-The system will be dual-integral circuit of the direct measurement of DC voltage, using analog switches to achieve non-contact switch on the range. A/D converter using common components constitute part of the analog part, using AT89S52 microcontroller with software, digital counting display while using AT89S52 microcontroller programmed DC voltage meter range automatic conversion, automatic zero, and the liquid crystal display.
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Size: 188416 |
Author: 海峰 |
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Description: Atmel MCU isp 下载线自制，在AT89S51/AT89S52上验证过，OK，可以放心使用。并可下载Altera_CPLD程序，是兼容的。-AT89S51 and Altera_CPLD ISP tool diy.
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Size: 149504 |
Author: yuv |
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Description: 积分式直流数字电压表的设计
摘要:介绍了一种基于单片机的积分式直流数字电压表的硬件实现和软件设计方法.此数字电压表采
用自动校零型双积分A/D转换器的原理,利用单片机来控制A/D转换,测试结果表明:该电压表测量误差小,
工作稳定,还具备自动量程转换功能
-Integral DC digital voltmeter design Abstract: This paper introduces a microcomputer-based integral-type DC digital voltage meter hardware implementation and software design method. This digital voltmeter with automatic zero-type double-integrating A/D converter principle, single-chip computer to control the A/D conversion, test results show that: The voltage meter measurement error is small, job stability, but also with automatic range conversion
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Size: 95232 |
Author: ghdsh |
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