16keyboardcontrolexperimentmatrix

利用PCF8591模数转换和外拓借口来用作电压测量(Use PCF8591 analog to digital conversion and the extension of the pretext for voltage measurement)

具有模糊算法的温控控制程序，具有自整定功能，控制精度高，适合STC及51系列单片机移植(temprature control program,with FUZZY PID,and auto-adjust fuction,suitable for STC MCU or other 8051 serial MCU)

DAC数模转换，SPI串口通讯，单片机stm32，快速简单(DAC digital mode conversion, SPI serial communication, MCU STM32, fast and simple)

十六进制BCD码的转换及VB串口通信，C51程序功能函数(Hexadecimal BCD code conversion and VB serial communication, C51 program performance function)

说明：  51实验21：DA数模转换 DA-PWM输出实验 * 实现现象：下载程序后DA模块上的指示灯呈呼吸灯效果，由暗变亮再由亮变暗(51 Experiments 21:DA Digital-to-Analog Conversion DA-PWM Output Experiment* Realization Phenomenon: After downloading the program, the indicator lamp on DA module shows the effect of breathing lamp, which changes from dark to light and then from light to dark.)

stm32F103 TIM1输出7路PWM STM32F103ZET6总共有8个定时器，TIM1和TIM8是高级控制定时器，TIM2、3、4、5是通用定时器， TIM6和TIM7是基本定时器。 本例程实现高级控制定时器TIM1总共7个功能引脚输出PWM波形。(STM32F103ZET6 has 8 timers in total, TIM1 and TIM8 are advanced control timers. This routine implements an advanced control timer TIM1 that outputs PWM waveforms for a total of 7 function pins.)

称取食物热量，可以预设单位重量热量值。通过扫描压力传感器信号，实时显示重量及热量(a 51 MCU process weight food calorie)

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.)

AT89S52的C5193C46储存数字的程序，已经编译通过。(AT89S52 the C51 93C46 stored procedures figures have been compiled through.)

电子万年历，实现分秒年月的显示，并且可以设定时间(Electronic calendar, minute and second years of the show, and you can set the time)