Modbus_HoldStart)

用PIC单片机实现带音乐播放的电压表,最高实现3.3V的电压测试(PIC mcu)

c51单片机的sle4442卡的读写加密验证程序 已通过(c51 microcontroller sle4442 card reader encrypted authentication procedure has been adopted)

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)

ImportRegPol is a non-interactive tool that imports the settings from a Registry Policy (registry.pol) file into the Computer or User configuration of the local group policy of the current computer. It can also parse a registry.pol file and produce an editable text file that can be consumed by Apply_LGPO_Delta v2.0.

STM32L152VB的AD采集程序，7通道DMA方式采集，通过串口发送到PC，本人查阅多方资料亲自编程测试，可直接用。附带STM32L152VB工程模板，本人根据资料自己建的。(The AD STM32L152VB acquisition program, 7 channel DMA acquisition, through the serial port to send to the PC multi access information, I personally programming test, can be directly used. With STM32L152VB project templates according to the data, I built myself. )

ds18b20的温度显示跟序列号显示的程序(temperature ds18b20 shows the program with the serial number)

基于51单片机的数字电子秤，有文档的详细说明(A digital electronic scale based on 51 single chip microcomputer with detailed description of the document)

VB 开发C51的动态链接库，可以拿来直接用的，(VB-C51 dynamic link library that can be used directly, and)

A， 单发单收，在发送状态，能够连续发送从0到99的数字； B， 单发单收，在接收状态，能够接收数据，并在数码管上正确地显示出来； C， 单发多收，在AB完成的基础上，接上多个接收设备，能够正确发送和接收 这是从站2的代码(A, single-input single in the sending state, capable of continuously transmitting a number from 0 to 99 B, single-input single in the receiving state, capable of receiving data, and display correctly in the digital tube out C, single overcharged, on the basis of AB completed, connect multiple receiving devices, capable of sending and receiving the correct code from the station which is 2)

郭天祥教学单片计配套电路图，可用proteus打开，比完成相应的实验(It is the circuit for the using of SCM of Guo Tianxiang training. )