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VSPD
可虛擬兩個RS-232或者是多個RS-232互傳資訊，此源码維Visual Basic所編寫。(Can be a virtual two RS-232 or RS-232 over pass each other information, this source code written by Visual Basic dimension)
- 2020-11-27 09:19:30下载
- 积分：1
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John.Wiley.and.Sons.You.Can.Do.It.A.Beginners
[2005最新C++经典著作].John.Wiley.and.Sons.You.Can.Do.It.A.Beginners.Introduction.to.Computer.Programming.eBook-DDU([2005 C latest classics]. John.Wiley.and.Sons.Yo u.Can.Do.It.A.Beginners.Introduction.to. Computer.Programming.eBook- DDU)
- 2007-01-08 10:06:54下载
- 积分：1
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JIS_Absensi
finger 103 for fingerscan
- 2014-11-18 21:48:26下载
- 积分：1
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cedianzu
利用51单片机做电阻测量仪，实现按键设置阻值自动报警提示(The use of 51 single-chip resistance measuring instrument to achieve automatic alarm button to set the resistance)
- 2013-07-28 01:39:05下载
- 积分：1
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2-ds18b20
ds18b20的温度显示跟序列号显示的程序(temperature ds18b20 shows the program with the serial number)
- 2012-12-01 21:03:59下载
- 积分：1
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modbus-TCPIP
modbus TCPIP协议client-Server代码,c++。(TCPIP client-Server protocol MODBUS source code and analysis, c++ programming.
)
- 2016-09-24 20:54:49下载
- 积分：1
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SMT-technology(2)
电路模块表面组装技术(上)，介绍SMT的组装和检测技术以及相关重要知识。(Circuit module surface mount technology (on), introduced SMT assembly and testing technology and related critical knowledge.)
- 2014-03-25 08:52:35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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bujindianji
单片机at89c52控制步进电机，愿跟大家一起分享(Microcontroller at89c52 control stepper motor, is willing to work with you to share with)
- 2012-11-29 18:44:27下载
- 积分：1
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adn
AD转换资料，超全大量AD采集电压以及采集电流的方法！(AD conversion data, a large number of ultra-wide voltage and collected current AD acquisition method!)
- 2013-09-01 17:58:25下载
- 积分：1
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