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电源技术  DN458降压转换器简化低电压设计

&nbsp; Many system designers need an easy way to producea negative 3.3V power supply. In systems that alreadyhave a transformer, one option is to swap out the existingtransformer with one that has an additional secondarywinding. The problem with this solution is that manysystems now use transfor ...

https://www.eeworm.com/dl/505/24335.html

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电源技术  离线式LED照明简述

&nbsp; As environmental concerns over traditional lighting increaseand the price of LEDs decreases, high power LEDsare fast becoming a popular lighting solution for offl ineapplications. In order to meet the requirements of offl inelighting&mdash;such as high power factor, high effi ciency, isol ...

https://www.eeworm.com/dl/505/24343.html

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电源技术  利用高压看门狗定时器加强汽车安全系统

&nbsp; Abstract: As electronic systems take over many of the mechanical functions in a car&mdash;ranging from engine timing to steering andbraking&mdash;there is a growing concern about fault tolerance. There should not be a single point of failure that would prevent a car fromat least "limping" ...

https://www.eeworm.com/dl/505/24368.html

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电源技术  基于IR2101最大功率跟踪逆变器的设计

为解决直流逆变交流的问题，有效地利用能源，让电源输出最大功率，设计了高性能的基于IR2101最大功率跟踪逆变器，并以SPMC75F2413A单片机作为主控制器。高电压、高速功率的MOSFET或IGBT驱动器IR2101采用高度集成的电平转换技术，同时上管采用外部自举电容上电，能够稳定高效地驱动MOS管。该逆变器可以实现DC/AC的转换，最大 ...

https://www.eeworm.com/dl/505/24421.html

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电源技术  电流检测电路手册

　　Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the tech-niques to do so are as diverse as the applications them-selves. This Application Note compiles solutions to cur-rent sensing problems and organizes the solutions by general application ...

https://www.eeworm.com/dl/505/24426.html

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单片机编程  P89LPC912英文资料

The P89LPC912/913/914 are single-chip microcontrollers in low-cost 14-pin packages, based on a high performance processor architecture that executes instructions in two to four clocks, six times the rate of standard 80C51 devices. Many system level functions have been incorporated into the P89LPC912 ...

https://www.eeworm.com/dl/502/28732.html

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单片机编程  Atmel AT89C系列单片机电路板设计指南

Designing Boards with Atmel AT89C51,AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test. Recent improvements in chips and testers have made it possible for the tester to begin taking over the role tradi-tionally assigned to the PROM program-mer. Instead of having a PROM pro- g ...

https://www.eeworm.com/dl/502/29091.html

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单片机编程  单片机P0口的片外数据存储器扩展

单片机作为一种微型计算机，其内部具有一定的存储单元（8031除外），但由于其内部存储单元及端口有限，很多情况下难以满足实际需求。为此介绍一种新的扩展方法，将数据线与地址线合并使用，通过软件控制的方法实现数据线与地址线功能的分时转换，数据线不仅用于传送数据信号，还可作为地址线、控制线，用于传送地址信号和控 ...

https://www.eeworm.com/dl/502/29174.html

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单片机编程  基于单总线式无线温度采集系统设计

为提高温度测量效率，降低系统的成本，扩展传输距离，设计出一种新型温度采集系统。单片机通过控制具有单总线方式的温度传感器DS18B20实现对温度的测量，同时单片机通过控制具有单总线方式300～450MHz频率范围内的MAX7044与MAX7033无线发射与接收芯片实现温度数据的无线传输。与传统温度采集系统相比，该系统利用单总线方式 ...

https://www.eeworm.com/dl/502/29183.html

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单片机编程  基于Attiny13的投影仪防盗器设计

介绍一种以Atmel公司的Attiny13为处理器的投影仪防盗器设计方案。该防盗器具有功耗低，功能完整，防盗效果良好等特点，除具有报警功能外，防盗器还具有以无线方式向主机发送报警信号的功能。采用315MHz发射模块实现无线信号发送。该投影仪防盗器可适应众多厂家生产的防盗器主机。 Abstract: &nbsp;This paper introduces ...

https://www.eeworm.com/dl/502/29190.html

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