介绍一种采用单片机技术和基站器件EM4095的手持式低频RFID读卡器方案。首先对整个系统框架进行说明,然后介绍主要功能模块的设计,给出了各模块的原理图。重点描述了基站器件EM4095的性能参数和功能原理,最后描述了该系统的主程序流程图。 Abstract: In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At first,the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last,the main software flow is given
上传时间: 2013-10-18
上传用户:windypsm
在汽车发动机起动时,若发动机起动后起动机不能及时断电,将会烧毁起动机或损坏飞轮齿环;若变速器不在空档位置起动,则起动机的瞬间动力将使汽车位移,还可能引起交通事故和人身安全。为此介绍一种利用NXP P89LPC901单片机控制的汽车起动保护控制器,通过检测汽车起动开关、变速箱档位、发动机转速,实现对汽车发动机起动过程检测和保护。起动保护控制器在发动机起动过程中通过采用逐个关闭打开负载系统,解决汽车发动机过程中因起动电流大而对汽车电源的冲击影响,延长了电瓶寿命。 Abstract: When the automotive engine is started, the engine start motor and flywheel gear may be damaged, even traffic accidents and personal safeties may be caused by wrong operation or other factors.In order to ensure the automotive engine can be started normally and safely,it is necessary that the protecting measures and methods are considered in the automotive electrical control system.This paper introduces a kind of the automotive engine starting protect controller based on NXP P89LPC901 MCU.The controller can protect the engine starting process by detecting the starter key switch,transmission stall and engine speed.Through the use of close and open load system,the controller can solve the impact on automotive power because of the high-current load in the process of the automobile engine starting, and extend battery life.
上传时间: 2013-10-15
上传用户:mikesering
针对目前采用的热敏电阻测量方法,提出了采用单总线数字式温度传感器DS18B20和单片机组成的新型温度测量仪。介绍DS18B20的结构和工作原理,以及单总线工作原理,给出了由Mega8单片机和DS18B20构成的单总线温度测量仪的硬件电路及软件流程图。经试验基于单总线器件DS18B20的温度测量仪,具有测量准确、测温范围宽、体积小、控制方便等优点。 Abstract: This paper brings forward a new temperature meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20's structure and controlling principles are introduced and hardware circuit and software diagram of the temperature meter are given.After been tested,the temperature meter has the advantages of accurate measurement, wide temperature range, small volume and convenient controlling.
上传时间: 2013-10-31
上传用户:hzy5825468
摘要:设计的自动高压测试仪,以16位微处理机为核心,以IGBT为逆变器件,采用了智能输出调节技术,测试电压反应快、精度高、波形失真小。由于在电路和软件程序中设置保护功能,仪器运行可靠。自动高压测试仪功能完备、分析能力强、操作简便。关键词:微处理机;测试仪;高压;规则采样
上传时间: 2014-12-27
上传用户:qlpqlq
力源可提供ON、TI、ST、Freescale和Chipswinner公司的优质功率器件,包括MOSFET驱动器、外设起动器/驱动器、功率逻辑、电机控制器、功率因子控制器、达林顿晶体管整列、钳位电路和虚地发生器等。
标签: 功率器件
上传时间: 2014-12-27
上传用户:zfyiaaa
宏晶STC90C58AD系列单片机器件手册
上传时间: 2013-10-15
上传用户:ZZJ886
STC8051系列单片机器件手册
上传时间: 2014-12-27
上传用户:shen_dafa
STC12C5410AD系列单片机器件手册
上传时间: 2013-11-11
上传用户:stewart·
STC12C5628AD系列单片机器件手册
上传时间: 2013-11-19
上传用户:linlin
STC12C5A60AD系列单片机器件手册
上传时间: 2013-11-20
上传用户:lnnn30