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2017校内竞赛（直流电阻箱）
本次设计的数控直流电阻箱主要由恒定电流源部分、显示部分、键盘部分、电源部分组成。以STM32单片机为核心控制恒流源，恒流源电路由达林顿三极管、高精度运算放大器、采样电阻等组成。通过键盘输入给定值，经D/A转换器将数字信号转换为模拟信号，控制电流。采用电流反馈电路控制精度，经多次调试改进，实现了直流电阻箱的功能。本次设计的数控直流电阻箱较以往的电阻箱相比，其优点在于可操作性强、精度高、体积小、高效节能等优点。适用于作为直流负载的应用场合。(The numerical control DC resistance box designed mainly consists of constant current source part, display part, keyboard part and power supply part. The constant current source is controlled by STM32 single chip microcomputer. The constant current source circuit is composed of Darlington transistor, high precision operational amplifier and sampling resistor. Through the keyboard input a given value, the D/A converter converts the digital signal into analog signal to control the current. The control precision of the current feedback circuit is improved, and the function of the DC resistance box is realized through many debugging improvements. Compared with the conventional resistance box, the designed DC resistance box has the advantages of strong operability, high accuracy, small size, high efficiency and energy saving. It is suitable for application as DC load.)
- 2018-06-24 16:39:43下载
- 积分：1
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fyp-rs232
rs232 communication for PIC 16f877 using ccs compiler
- 2011-11-01 15:37:14下载
- 积分：1
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110kv
根据设计任务书的要求，本次设计为110kV 变电站电气一次部分初步设计，并绘
制电气主接线图及其他图纸。该变电站设有两台主变压器，站内主接线分为110kV、
35kV 和10kV 三个电压等级。各个电压等级分别采用单母线分段接线、单母线分段带
旁母接线和单母线分段接线(From the guide of engineering design assignment, we have to
design primary power-system of 110kV substation and draw main
electrical one-line diagram and others. There are two main
transformer in the substation in which main electrical connection
can be divided into three voltage grades: 110kV, 35kV with 10kV.It
deposits sectionalized single bus bar scheme, sectionalized single
and transfer bus bar and sectionalized single bus bar scheme per
grade.)
- 2020-11-01 11:49:54下载
- 积分：1
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KEY
自己写的一个带有松手检测和长按识别，短按识别，长短按区分的键盘扫描程序(Write your own keyboard scanner with a loosely detection and long-identification, press recognition, length according to the distinction)
- 2012-07-19 15:25:28下载
- 积分：1
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ERDAS-IMAGINE-2014Licenses
erads最新破解软件2016版,亲测有用(very good)
- 2016-09-19 16:35:02下载
- 积分：1
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yejing12864
这是一个液晶的测试程序,是一款用ST7920做芯片的12864液晶的程序,绝对可用,方便而且可移植调用,还附有说明书(This is a test procedures for liquid crystal, is a ST7920 to do with the 12864 chip LCD procedures, absolutely available, convenient and portable call, accompanied by brochures)
- 2007-12-21 18:12:09下载
- 积分：1
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main
基于Keil C51编译环境的单片机程序，实现外部频率检测，并将结果通过串口发送到计算机。(Based on the Keil C51 compiler environment Singlechip procedures, the realization of the external frequency of detection, and the results sent to the computer through the serial port.)
- 2009-01-13 14:50:42下载
- 积分：1
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46-bu-jin-dian-ji-zhen-fan-zhuan
内容：1、本程序用于测试4相步进电机常规驱动
2、需要用跳帽或者杜邦线把信号输出端和对应的步进电机信号输入端连接起来
3、速度不可以调节的过快，不然就没有力矩转动了
4、按s4（设置成独立按键模式）可以控制正反转 (Content: This program is used to test the four-phase stepper motor conventional drive 2, you need to jump the caps or the DuPont line signal output and the corresponding stepper motor signal input to connect, the speed can not be adjusted too fast. otherwise there is no torque rotation, set individual keys by s4 () can control the reversing)
- 2012-06-27 15:23:33下载
- 积分：1
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8
说明： 课程：微机接口技术 课程设计题目：单片机最小系统(Course: Computer Interface Technology Curriculum Design Title: Single-chip minimum system)
- 2008-01-05 01:43:41下载
- 积分：1
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Electric-Springs
Electric Springs—A New Smart Grid Technology论文 新型电能质量调节设备(Electric Springs—A New Smart Grid Technology)
- 2014-02-17 11:02:08下载
- 积分：1
