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TempHumSystem
这是一个用于工控的上位机系统，可以实时监测温度，露点，湿度。用户可以根据具体情况设定报警点，当达到报警点，系统通过邮件发送报警信息给用户。(This is a PC for industrial control of the system, can be real-time monitoring of temperature, dew point and humidity. Users can set alarms based on specific circumstances, when the police reached, the system, through e-mail warning messages to users.)
- 2009-05-16 10:46:36下载
- 积分：1
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2-74HC595
51单片机程序，两个74HC595驱动8位数码管程序，串行输入，3个IO口控制8位数码管动态扫描(failed to translate)
- 2020-12-31 12:18:59下载
- 积分：1
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cheng
滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)
- 2011-07-17 16:23:27下载
- 积分：1
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USB2
USB2.0原理与工程开发光盘 欢迎下载(The USB2.0 principles and engineering development of CD-ROM Download)
- 2012-05-29 17:15:15下载
- 积分：1
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MSP430PPDIUSBD12
msp430与PDIUSBD12的固件程序
D12驱动win2k_xpD12test.inf
D12驱动win98D12TEST.SYS
usb上位机测试程序usb430d12EasyD12.dll
usb上位机测试程序usb430d12EasyD12.H
(msp430 the PDIUSBD12 firmware
D12 driver win2k_xp D12test.inf
D12 driver win98 D12TEST.SYS
usb host computer test program usb430d12 EasyD12.dll,
usb host computer test program usb430d12 EasyD12.H,
)
- 2012-04-25 14:48:03下载
- 积分：1
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DataAdapter
使用DataAdapter对数据库进行操作
将SQL-search.aspx程序可改为使用DataAdapter对数据库进行操作.
程序使用"Dim objAdapt As New OleDbDataAdapter(strcmd,objCon)"创建了DataAdapter对象。(Use DataAdapter to operate the database
The SQL-search.aspx program can be changed using the DataAdapter to operate the database. The program uses "Dim objAdapt As New OleDbDataAdapter (strcmd, objCon)" Creating a DataAdapter object.
)
- 2013-12-27 21:39:40下载
- 积分：1
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data-collection-with-51-top-to-down
这是关于电路板的设计图，方便大家下载。呵呵 (This is about the second Five-Year Plan, said a key project for the future development of a box of reference
)
- 2011-07-14 22:05:18下载
- 积分：1
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i2c-time
I2C总线协议应用,利用单片机中断实现可以记忆的时钟,程序自己已经调试过，绝对能用(I2C bus protocol applications, the use of the microcontroller interrupt memory clock, program debugging, and absolutely can)
- 2012-08-07 14:56:54下载
- 积分：1
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signal-intersection
智能交通单路口C++仿真程序，其中设置了随机车辆产生，以及信号配时功能，程序编译已验证(Intelligent Transportation single intersection C++ simulation program, which is set to generate random vehicles, as well as signal timing functions, the program compiled Verified)
- 2014-03-01 09:39:29下载
- 积分：1
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test
51单片机控制16乘以16点阵，可以显示汉字等(51 single chip control 16 times the 16 dot matrix, you can display Chinese characters, etc.)
- 2016-02-20 19:39:45下载
- 积分：1
