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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: 几种数控电流源的设计：最新的简易方法，无解压密码-current source of design : the latest summary, without extracting passwords
Platform: |
Size: 151552 |
Author: 付朝霞 |
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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: 驱动串行ＡＤ转换器ＡＤ７５４３，简单易懂，兼容性好-Drive serial AD converter AD7543, easy-to-read, good compatibility
Platform: |
Size: 1024 |
Author: qique |
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Description: 基于热敏电阻的温度测试系统,采用avr单片机作为控制器来实现，用数码管来显示-Thermistor-based temperature test system, using avr as a controller to achieve single-chip, digital control to display
Platform: |
Size: 1276928 |
Author: 张莉明 |
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Description: AD7543的逻辑电路由12位串行输入并行输出移位寄存器(A)和12位DAC输入寄存器(B)以及12位DAC单元组成。在选通输入信号的前沿或后沿(由用户选择)定时地把RSI引脚上的串行数据装入寄存器A，一旦寄存器A装满，在加载脉冲的控制下，寄存器A的数据便装入寄存器B。并进行D/A转换。-将中文译成英语显示罗马拼音
AD7543 12-bit logic circuit from the serial input parallel output shift register (A) and 12-bit DAC input register (B) and 12-bit DAC modules. Strobe input signal in the front or back along the (user selected) time in the RSI pin on the serial data into register A, if register A full, under the control of the loading pulse, the data register A casual into the register B. And for D/A converter.
Platform: |
Size: 773120 |
Author: 韦家正 |
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