光电应用 - 精通维修下载

[图文] 200W功率的灯闪光电路 2010-02-28

200W功率的灯闪光电路,200W Lamp FlasherSpecifications 200W Lamp Flasher kit is used to flash lamps, bulbs and halogen lamp to give your product that attracting look. Input supply - 6 ~ 12 VDC Output - ...

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[组图] 黑暗感应开关电路 2010-02-28

黑暗感应开关电路,Dark Sensitive SwitchSpecifications Dark Sensitive Switch is a simple project which operates a relay when the light falling on the LDR goes below a set point. Input - 12 V @ 55 mA Rel...

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[图文] 5个灯的LED闪光灯驱动器电路 2010-02-28

5个灯的LED闪光灯驱动器电路,5 Lamp/LED Flash DriverGeneral Description of the following circuit. This circuit is based around HT–2050 manufactured by HOLTEK semiconductors. It is a low cost, low-power...

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[图文] 低成本自动应急灯电路 2010-02-28

低成本自动应急灯电路,Low cost/Automatic Emergency LightDescription Here is a white-LED-based emergency light that offers the following advantages:1. It is highly bright due to the use of white LEDs. 2...

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[图文] 利用开关模式降压转换驱动器降低功耗并提高照明组件的驱动效率 2010-02-28

利用开关模式降压转换驱动器降低功耗并提高照明组件的驱动效率当输入电压远远高于串联HB LED的总压降时，最好使用开关模式降压(buck)转换驱动器(图2)，能够使电源功耗降至最低，从而获得较高的驱动器效率。与一般HB ...

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[图文] 手电筒电池的1.5伏升压到LED所需的3.5伏 2010-02-26

这里描述的电源把电压从一节手电筒电池的1.5伏提高到LED所需的3.5伏，同时用电源把LED和手电筒电池串联起来。设计这种电路是为了用LED对手电筒进行改进。增压电路在有两节电池的手电筒中将代替的一节电池，LED装置则...

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[图文] 使用74LS164的并行输出端接8支发光二极管 2010-02-26

使用74LS164的并行输出端接8支发光二极管使用74LS164的并行输出端接8支发光二极管，利用它的串入并出功能，把发光二极管从左到右依次点亮，并反复循环。假定发光二极管为共阴极接法。解：电路如图8.5。软件部分如下：...

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[组图] 基于AT89C2051串口的LED数码管显示电路 2010-02-24

AT89C2051单片机内有一个串行I／O端口，通过引脚RXD[P3．0]和TXD[P3．1]可与外部电路进行全双工的串行异步通信，发送数据时由TXD端送出，接收时数据由RXD端输入。串口有四种工作方式，通过编程设置，可以使其工作在...

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[组图] 解读高速数字电路中电子隔离应用技巧 2010-02-23

概要本应用报告概述了高速数字电路中电子隔离的必要性、实施以及特性，讨论了在一个隔离层上进行光、磁(电感)和电气(电容)信号传输的优点和缺点，并对ISO72x系列数字隔离器中使用的电容耦合技术作了特别的重点阐述...

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[图文] 小型直流电机电子稳速电路 2010-02-20

图WS-1是常用小型直流电机电子稳速的典型电路。BG1是调速管，BG2是比较放大管，比较电压由R1、R2R3和电机M所组成的电桥的两端A、B点取得的。W是速度做微调电阻，当电路在平行状态时，A、B两点电压为零，W无电流流过...

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[图文] 白色LED驱动电路 2010-02-20

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[图文] 遥控调光调速发射器电路 2010-02-20

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[图文] 用TS556构成的12V调光器电路 2010-02-20

TS556应用电路——12V调光器电路

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[组图] DWR系列就地补偿式节能软起动器 2010-02-20

　4<'减少电压损失。5、减少接触器触头损耗。6、节约有色金属消耗。7、减轻尖峰负荷冲击,对冲击负荷设备能起到削减尖峰电流作用。采用无功就地补偿装置后,交流电动机的功率因数可由0。5-0。7提高到0。95~0。99,节电...

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[组图] 600W高压钠灯电子镇流器的研制 2010-02-15

摘要：研制了一种基于不定频率控制的高效、可靠的高压钠灯电子镇流器，采用设计频率调制技术消除了声共振，及简单可靠的谐振式启动电路及过流、过压和异常保护电路。关键词：高压钠灯；声共振；频率调制；串联谐振 ...

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[组图] Cypress CY8CLED04D0x PowerPSoC智能LED驱动方案 2010-02-15

PowerPSoC™ Intelligent LED Driver:CY8CLED04G01,CY8CLED03G01,CY8CLED03D01, CY8CLED03D02, CY8CLED04D01, CY8CLED04D02The PowerPSoC family incorporates programmable system-on-chip technology with th...

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[图文] Fairchild FAN6754 PWM反激型电源转换方案 2010-02-15

Fairchild 公司的FAN6754 是高度集成的绿色模式(Green-Mode) PWM控制器,以增强反激电源转换器的性能.为了最小化待机功耗, 绿色模式功能提供关时调制,连续降低轻负载的开关频率.工作电流1.7mA,固定PWM频率为65KHz,可线...

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[组图] 1-5W MR16 LED驱动GreenPoin解决方案 2010-02-15

1-5W MR16 LED驱动GreenPoin解决方案This reference document describes a built and tested, GreenPoint® solution for a 1 to 5WLED driver for MR16 LED replacement. The circuit is proposed for driving H...

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[组图] On Semi NCP3065 MR16 LED 1-5W驱动解决方案 2010-02-15

On Semi NCP3065 MR16 LED 1-5W驱动解决方案On Semi公司的NCP3065是高达1.5A恒流开关稳压器,输入电压从3.0V到40V,反馈电压235mV,工作频率可调整到高达250kHz,逐个周期限流,主要用在汽车照明,大功率LED驱动器,恒流源已...

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[组图] 6通道自动逆向行驶灯顺序迪斯科 2010-02-10

6通道自动逆向行驶灯顺序迪斯科 6 Channel Auto Reverse Sequential Disco Running LightsFrom 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator a...

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[组图] 简单的LED电源项目电路 2010-02-10

简单的LED电源项目电路 A power source for simple LED projectsLED's are great display tools. Their prices have decreased to a point where they are replacing more conventional light sources. In one sense...

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[组图] 三频闪仪电路 2010-02-10

三频闪仪电路 Triple Stroboscope This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power supply th...