add_shot_reel

Arduino LCD library

说明：  直流电动机检测程序，用于检测电动机是否正常(DC motor testing procedures for detecting whether the normal motor)

单片机时钟编程，包括秒表，时钟以及闹钟，亲测可用，包括DSN文件(Microcontroller clock programming, including a stopwatch, clock, and alarm clock, pro-test are available, including DSN file)

ATmega8 Temperature monitoring using LM35

实现stm32f103c8t6双机CAN通讯(Implementation of stm32f103c8t6 dual CAN communication)

摘要 电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。 基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。 关键词：数字合成信号源；程控；调幅；调频；移相； (Abstract Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration. Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)

多功能液晶显示数字钟，可以在Nokia5110液晶上实时显示时间点、温度、闹钟点，在待机界面上可以滚动显示中文标题，菜单选项也比较新颖(Multi-function LCD digital clock that can display real-time, temperature, alarm points Nokia5110 LCD on the standby screen to scroll the display Chinese title, menu options are relatively new)

高精度算法的，PT100测温项目，包含源代码和设计文档，还有原理图(High precision algorithm, PT100 temperature measurement project, including source code and design documents, as well as schematics.)

ATT7026汇编语言读写程序，原理图，可以直接做成三相电表。(ATT7026 assembly language literacy procedures, drawings, and can directly create three-phase transformer.)

0.96寸OLED显示12864英文驱动，可显示2种字体(0.96-inch OLED display 12864 English driver, you can display two kinds of fonts)