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switch

switch是交换机,它的前身是网桥。交换机是使用硬件来完成以往网桥使用软件来完成过滤、学习和转发过程的任务。switch速度比HUB快,这是由于HUB不知道目标地址在何处,发送数据到所有的端口。而switch中有一张转发表,如果知道目标地址在何处,就把数据发送到指定地点,如果它不知道就发送到所有的端口。这样过滤可以帮助降低整个网络的数据传输量,提高效率。但然交换机的功能还不止如此,它可以把网络拆解成网络分支、分割网络数据流,隔离分支中发生的故障,这样就可以减少每个网络分支的数据信息流量而使每个网络更有效,提高整个网络效率。目前有使用switch代替HUB的趋势。
  • PW2163D.pdf规格书下载

    The PW2163D is a high frequency, synchronous, rectified, step-down, switch-mode converter withinternal powerMOSFETs. It offers a very compact solution to provide a 3A continuous current over awide input supply range,with excellent load and line regulation.The PW2163D requires a minimal number of readily available, external components and is availablein a spacesaving SOT23-6 package

    标签: pw2163d

    上传时间: 2022-02-11

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  • PW2163-2.0.pdf规格书下载

    The PW2163 is a high efficiency 500 kHz synchronous step-down DC-DC converter capable ofdelivering 3A current. The PW2163 operates over a wide input voltage range from 4.5V to 18V andintegrates main switch and synchronous switch with very low RDS(ON) to minimize the conductionloss. Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500kHz switching frequency. It adopts the instant PWM architecture to achieve fast transient responsesfor high step down applications

    标签: pw2163

    上传时间: 2022-02-11

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  • Altium Designer常用器件集成库PCB封装库原理图库3D库元件库

    Altium Designer常用器件集成库PCB封装库原理图库3D库元件库集成库原理图器件型号列表:76个13W3                2N7002              74HC0474HC0874HC244D74HC595             74LS138             80508550                8P4R_0603ADM2582EADM3053AS5145B             AT24C02BAT54SBUZZ                BatteryCCT6806CD4001CD4053CapacitorDS18B20Diode               Diode SchottkyFP6101FT2232DFUSEHMC5883LINA118IR2010IR2101SIR2136SIRF1010EIRFP7404ISO7240InductorLEDLF444LG9110SLM339LM393LMV7239MAX232MCP2551MCP6022MCP6024MPU6050Mic2941Micro SD CardMicro USBNuMicro-M051OPTOISOIPESDxS2UATPT2272PVI1050PhonejackResistanceSN65VHD230STC12LE5202STM32F103CBT6STM32F103RBT6STM32F103VCT6STM32F407VswitchTJA1050TLV5638ITMS320F28035PAGTMS320F28035PNTOP242U18UC3854ULN2803USB A-BVBUS                Xtal             集成库PCB封装列表:76个8P4R_060313W30805DBC04-BBT_CR1220BUZZC0201C0402C0603C0805C1206CD127CPX-32CRYSTALD1206DC-0003DC-0005DIP-4DIP-6DIP-8DO-201ADDO-214AADO-214ABDO-214ACF5mmFUSEFUSE_001FUSE_LFUSE2HC-49/U-SHDRX3L-330uHLCC-24NLPCC-16NLQFP-48LQFP-64LQFP-80Micro SD CardMicro USBR0201R0402R0603R0805R1206R1210R2512SDRH5D18-220NSIP-3SMD CRYSTALSMD-8SOIC-4SOIC-8SOIC-14SOIC-16SOIC-16WSOIC-18SOIC-20SOIC-24SOIC-28SOT-23SOT23-5SOT23-6SWswitch1TD-19XATO-92TO-92ATO-220-2TO-220ATO-220BTO-247ACTO-263-5TQFP-100TSSOP-16USB DIPUSB-A

    标签: altium designer pcb

    上传时间: 2022-02-12

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  • PW1555-2.0.pdf规格书

    PW1555 is a programmable current limit switch with input voltage range selection and outputvoltage clamping. Extremely low RDS(ON) of the integrated protection N-channel FET helps toreduce power loss during the normal operation. Programmable soft-start time controls the slew rateof the output voltage during the start-up time. Independent enable control allows the complicatedsystem sequencing control. It integrates the over-temperature protection shutdown andautorecovery with hystersis

    标签: pw1555

    上传时间: 2022-02-14

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  • 8205A8_2.0.pdf规格书下载

    The PW8205A8TS is the highest performance trench N-ch MOSFETs with extreme high cell density,which provide excellent RDSON and gate charge for most of the small power switching and loadswitch applications. The meet the RoHS and Product requirement with full function reliabilityapproved .

    标签: 8205a8

    上传时间: 2022-02-14

    上传用户:wangshoupeng199

  • 光耦传感器元件Altium Designer AD原理图库元件库文件

    光耦传感器元件Altium Designer AD原理图库元件库文件CSV text has been written to file : 11.1 - 传感元件.csvLibrary Component Count : 34Name                Description----------------------------------------------------------------------------------------------------6N137               10M高速集成光耦817                 线性光耦AH3144              单极霍尔开关EL357N              线性光耦GP1A5xHR            槽间光电开关I-LED               红外二极管IDR                 光敏电阻MIC1                电容麦克风MIC2                电容麦克风MPU6050             数字运动传感器MS5611              气压传感器OPT                 红外接收管RG5528              光敏电阻RH6030              单通道电容式触摸ICROC16A              摇杆电位器ROC16B              摇杆电位器Reed switch         常开型干簧管S58                 槽间光耦ST188               反射型光耦SW-58010PL          震动传感器TCRT5000            反射型光耦TLP181              光耦TLP181_1            光耦TLP280-4            4组光耦TLP521-1            1路开关光耦TLP521-2            2路开关光耦TLP521-2A           2路开关光耦TLP521-4            4路开关光耦TLP521-4A           4路开关光耦TMR1302S            全极霍尔开关TMR1302T            全极霍尔开关UGN3503             线性霍尔传感器VS1838B             红外接收头ZME1930006          干式电流互感器

    标签: 传感器 altium designer

    上传时间: 2022-03-12

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  • 基于STC12C5A60S2单片机的LED线阵显示装置

    LED 线阵显示装置, 分为 LED 线性旋转显示主机和图文录入器两部分。主机用直流电机带动由红绿 LED 组成的线阵旋转, 同时线阵按照时序依次切换显示状态, 在固定区域利用视觉暂留效果形成 16×16 点阵, 用以显示图文;图文录入器用 HMI 触控屏作为人机交互界面, 实现图文录入和回放功能。主机与图文录入器通过无线通信方式进行信息交互,可由图文录入器控制主机切换不同工作任务, 以及改变线阵显示内容。The LED linear array display device is divided into two parts:the one is the main unit used to display content,and the other one is used to input the contents.The main unit is driven by a DC motor to rotate the linear array composed by red and green light emitting diodes.At the same time,the 16×16 dot matrix that switching the display state according to the time sequence on the main unit displays pictures and texts in the fixed area,by using the visual temporary effect.The HMI touch screen is used as human machine interface to realize the function that input and playback pictures and texts.The two parts of the device communicate with each other through wireless communication.The image and text input controller can control the main unit to switch different tasks and change the content of linear array displayed.

    标签: stc12c5a60s2 单片机 led

    上传时间: 2022-03-28

    上传用户:jiabin

  • Qi无线充电原理

    近距电能传输——高效安全近距电能传输一般基于电磁感应原理进行。在此技术基础上,当接收器邻近发射器时才会进行电能传输。电磁感应技术的历史长达百年,多年米一直应用于各类电子产品中—如此普及全因其简单、高效以及安全技术概览以下将为你简要介绍无线电能传输技术。System Overview(Communication)Receiver sends messagesTo provide control information to the transmitterBy load modulation on the power signaTransmitter receives messagesTo receive control information frorn the recelverBy de-modulation of the reflected loadPower Pick Up( Receiver)Secondary coil (L Serial resonance capacitor (C) for efficient power transfer Parallel resonance capacitor(C, )for detection purposes Rectifier: full bridge(diode, or switched)+ capacitor Output switch for(dis)connecting the loadReceiver modulates load by switching modulation resistor(R,n),or switching modulation capacitor(Ca)Transmitter de-modulates reflected load by Sensing pnmary coil curent (p)and/o Sensing primary coil voltage (V,

    标签: qi 无线充电

    上传时间: 2022-03-31

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  • 基于TMS320F28335的超声波流量计硬件原理图+软件源码

    基于TMS320F28335的超声波流量计硬件原理图+软件源码本文以TMS320F28335 处理器为核心,设计一种用于管道流量测量的超声波流量计。系统硬件由核心板,超声波发射和接收电路,切换电路,超声换能器,基于ADS805 的高速信号采集电路,人机交互以及电源等模块构成。采用时差法进行管道流量测量,时差测量采用SCOT 加权的广义互相关时延估计算法。本论文设计的超声波流量计具有测量速度快、准确性好、成本低等优点。关键字:C2000,超声波,流量,广义互相关算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm

    标签: tms320f28335 超声波流量计

    上传时间: 2022-05-06

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  • PID-小车类-基于Cortex-M0的BLDC电机驱动

    #include "NUC1xx.h"#include "Hal.h"#include "pwm.h"//wait current PWM cycle done, otherwise there maybe short pulse on FETvoid PWM_Stop(U8 ch){ switch(ch) { case PWM_CHANNEL_A: PWMA->u32CNR1 = 0; PWMA->u32CMR1 = 0; while(PWMA->u32PDR1 != 0); break; case PWM_CHANNEL_B: PWMA->u32CNR2 = 0; PWMA->u32CMR2 = 0; while(PWMA->u32PDR2 != 0); break; case PWM_CHANNEL_C: PWMA->u32CNR3 = 0; PWMA->u32CMR3 = 0; while(PWMA->u32PDR3 != 0); break; default: while(1); } PWMA->u32POE &= ~(1<<ch); PWMA->u32PCR &= ~(1<<(ch*8));}

    标签: pid 电机 bldc

    上传时间: 2022-06-01

    上传用户:kingwide