http://www.daycounter.com/Circuits/Short-Circuit-Protection/Short-Circuit-Protection.phtml Short circuit protection is often a desirable feature to add to power amplifiers or power supplies, for both safety concerns and protection of circuitry. The c…

For containing large amounts of bulk capacitance, controlling inrush currents poses problems. The simplest approach involves placing an inrush-limiting resistor in series with the capacitor bank, but a resistor wastes power and adds a voltage drop. T…

In certain dc/dc-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circuit. A nonsynchronous boost converter provides a direct path from the input to the short circuit thr…

I. Selection principle of motor protectorThe  Electric Motor Manufacturer   stated that the reasonable selection of the motor protection device can not only fully utilize the overload capability of the motor, but also avoid damage, thereby improving…

Transistor Tutorial Summary Transistor Tutorial Summary Bipolar Junction Transistor Tutorial We can summarise this transistors tutorial section as follows: The Bipolar Junction Transistor (BJT) is a three layer device constructed form two semiconduct…

RFID读写器的工作原理 RFID的数据采集以读写器为主导,RFID读写器是一种通过无线通信,实现对标签识别和内存数据的读出和写入操作的装置. 读写器又称为阅读器或读头(Reader).查询器(Interrogator).读出装置(Reading Device). 扫描器(Scanner).通信器(Communicator).编程/编码器(Programmer)等等. 读写器工作原理 RFID读写器的基本原理是利用射频信号与空间耦合传输特性,使电子标签与阅读器的耦合元件在射频耦合通道内进行能量传…

This 125 kHz RFID reader http://www.serasidis.gr/circuits/RFID_reader/125kHz_RFID_reader.htm http://www.serasidis.gr/circuits/RFID_reader/images/125kHz_RFID_reader_schem.GIF I will try to explain with simple words how the RFID works. The ATtiny13 use…

文章转载至CSDN社区罗升阳的安卓之旅,原文地址:http://blog.csdn.net/luoshengyang/article/details/6664554 在上一文章Android系统匿名共享内存Ashmem(Anonymous Shared Memory)简要介绍和学习计划中, 我们简要介绍了Android系统的匿名共享内存机制,其中,简要提到了它具有辅助内存管理系统来有效地管理内存的特点,但是没有进一步去了解它是如何实 现的.在本文中,我们将通过分析Android系统的匿名共享内存…

上一篇介绍了core-site.xml的配置,本篇继续介绍hdfs-site.xml的配置. 属性名称 属性值 描述 hadoop.hdfs.configuration.version 1 配置文件的版本 dfs.namenode.rpc-address 处理所有客户端请求的RPC地址,若在HA场景中,可能有多个namenode,就把名称ID添加到进来.该属性的格式为nn-host1:rpc-port. dfs.namenode.rpc-bind-host RPC服务器的真实地址,如果为空,则使…

又入了一台打印机,171到手,本来之前有更好的,无奈别人下手太快,只剩这台了. 175x135x180的样子. 创客的板,还带16g的闪迪内存卡,看到那会儿感觉赚大了! 拿到的时候不少螺丝松的,有的打印件也裂口了,拧紧螺丝,调平后打了打感觉操作很多不习惯, 连上电脑看固件原来是marlin1.0的!上github下载了1.19固件,网上似乎没有找到关于hbot的配置贴, 反正以前琢磨过不少次,直接上configuration.h 凭借经验改了改,基本能用了.之后有待调试. 这个平台用料很足,3点…