M500A

自制的pcb功能板，包含了温度检测与显示、光线检测、蜂鸣器提示以及自动投食舵机。(The self-made PCB function board includes temperature detection and display, light detection, buzzer prompt and automatic feeding steering gear)

自主设计的单片机之间的双机通信代码，额外附加了自如的收发功能，使用非常方便(Self-designed two-machine communication between the microcontroller code, attached to freely send and receive extra features, easy to use)

用于步进电机细分驱动，MSP430F149配置TMC429，进而驱动TMC249，细分驱动(Subdivision driver for stepper motor, MSP430F149 configuration TMC429 turn drives TMC249 Subdivision Driver)

单片机开发学习资料，对学习单片机开发的人员有一定的帮助。(SCM learning materials, learning microcontroller development personnel have some help.)

用PIC实现写种子工具,用232协议转换SPI协议实现.(Write-seed with PIC tools, protocol conversion with 232 SPI protocol.)

程序主要实现了无线模块nrf24l01传输温度的，功能。(Program achieved a major wireless module nrf24l01 transmission temperature function.)

心率采样电路，包括原理图，PCB单路及相关说明(Heart rate sampling circuit, including schematic, PCB single)

本文讲述了细分驱动技术的原理，重点介绍了细分驱动控制系统的设计方法，设计了一套传统细分驱动系统的设计方案，在此基础上，本文进一步介绍了L297、L298两块芯片，采用这两块芯片构成步进电机的驱动电路，应用DAC0832实现D/A转换，采用精简指令集单片机AVR作为脉冲产生器，对步进电机的工作过程进行控制，最终组成电机细分数可选的驱动控制系统。(failed to translate)

说明：  单片机实现RS485串口通信的基本原理，非常好理解，好好学习(The basic principle of RS485 serial communication realized by single chip microcomputer)

NFC MIFARE FELICA S50 S70 P2P ID卡 动物标签 18092 14443 技术详细介绍 (1)——概念、分类 (2)——国际标准 (3)——能量、调制 (4)——数据编码 (5)——防冲突 (6)——通讯协议概述 (7)——ID卡 (8)——动物标签 (9)——动物标签HDX (10)——识别号的格式变化 (11)——Mifare系列卡的共性 (12)——三次相互认证 (13)——Mifare S50与Mifare S70 (14)——Mifare S50与S70的存取控制 (15)——Mifare1的安全性及7字节序列号M1卡 (16)——Mifare?UltraLight (17)——射频卡中数据的存储形式 (18)——Mifare Desfire (19)——Desfire的3次握手认证和段密码生成 (20)——RC系列射频接口芯片 (21)——RC系列射频芯片的天线设计 (22)——RC系列射频芯片的寄存器操作 (23)——ISO15693的载波、调制与编码 (24)——ISO15693的防冲突与传输协议 (25)——Felica简介 (26)——Felica的文件系统 (27)——CPU卡概述 (28)——基于MF1射频卡的酒店门锁设计 (29)——射频接口芯片TRF7960 (30)——PN512的寄存器设置(NFC MIFARE FELICA S50 S70 P2P ID card animal tag 1809214443 technical details (1)- Concept, classification (2)- International Standard (3)- the energy modulation (4)- data encoding (5)- Anti-collision (6)- Communication Protocol Overview (7)- ID cards (8)- Animal tags (9)- Animal label HDX (10)- Changes format identification number (11)- Mifare series cards common (12)- three mutual authentication (13)- Mifare S50 and Mifare S70 (14)- Mifare S50 and S70 of the access control (15)- Mifare1 safety and 7-byte sequence number M1 card (16)- Mifare UltraLight (17)-? to store data in the form of RF card (18)- Mifare Desfire (19)- Desfire three-way handshake authentication and password generation segment (20)- RC Series RF Interface Chip (21)- RC Series RF chip antenna design (22)- RC Series RF chip register operations (23)- ISO15693 carrier modulation and coding (24)- ISO15693 anti-collision and transmission protocol (25)- Felica Introduction (26)- Felica file system (27)- CPU card Overview ()