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• 远离束缚生活和工作（Living And Working Off The Grid-Part 2）　2008-11-06 19:27
  Part 2: Installation and Performance Last time， I described the planning and design phase of our off-the-grid solar system in Silver City， NM. This month， I will cover the installation process and explain how the system operates. All the mounting， wiring， and enclosures had to comply with the latest National Electrical Code （NEC） and any local variations. The code is there for a purpose. There may be variation in the details with your local installer or inspector， but approaching them in...
  

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• 越来越流行的嵌入式（Embedder Than Ever）　2008-10-24 19:59
  ESC Delivers the Goods It‘s been a great year for embedded systems designers.You have plenty of new technologies and design options to consider. This month， Tom showcases the best and brightest on display at the 2008 Embedded Systems Conference in San Jose. This year‘s Embedded Systems Conference （ESC） in San Jose， CA，marked the twentieth year of the affair. Of course， embedded applications go back more than 20 years，indeed all the way back to the dawn of silicon. Nevertheless， ESC has...
  

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• 指纹数据采集(Fingerprint Data Acquisition)　2008-10-13 19:30
  Print Sensing with Embedded Technology Identifying and matching fingerprints is a tedious process that involves huge databases.Today,a few companies are using embedded microcontrollers to create stand-alone print-sensing systems. Jeff examines the latest fingerprint security technology from Atmel. I thought the popular television show CSI： Crime Scene Investigation would have run its course by now. However， even with two spin-offs， it still isn‘t losing its appeal. Because I stare at a monit...
  

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• QFP部分的标准（Prototyping with QFP Parts）　2008-10-08 16:39
  Fed up with trying to socket QFP parts， Stuart came up with a solution. He built a PCB with the QFP part he wanted and used it as a prototyping module. The system turns a QFP part into a socketable device that you can use for prototyping. The concept can be used for FPGAs，microprocessors， and other parts in QFP packages. In the old days of integrated electronics，integrated circuits came in DIP packages. It was easy to build a hand-wired prototype of your design. But as technology advanced an...
  

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• 实时操作系统设计(Real-Time Operating System Design)　2008-10-05 10:36
  Customize an OS for a Powerful Embedded MCU Naubert‘s ArmExe is an RTOS for the Luminary Micro Stellaris ARM Cortex-M3 family of microcontrollers and Keil's μVision environment. The multitasking preemptable executive uses task priorities， separate task and kernel stacks， and execution privileges. It handles all interrupts with priorities， supports nested interrupts， and implements binary semaphores and events as the resource-sharing mechanisms. When I first received my Luminary Micro evalu...
  

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• 建立于飞行数据采集的微处理器（MCU-Based Flight Data Acquisition）　2008-09-26 11:58
  Real-Time Vibration Measurement for Aircraft Excessive rotor vibration can endanger a helicopter and its crew. That‘s why Juan developed a system that measures a helicopter's tail rotor vibration in real time. The inexpensive design determines the maximum vibration amplitude in a Bell 206 JetRanger helicopter‘s tail rotor. An accelerometer and an optic sensor in the tail rotor collect data， which is later processed by a Cypress Semiconductor CY8C27443 microcontroller and displayed on a Hitach...
  

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• 快速数字过滤（Fast Digital Filtering）　2008-09-18 13:23
  Digital filtering is never fast enough. As Bruce explains， optimizing filtering on 8-bit microcontrollers， with no floating-point hardware， using 16-bit fixed-point arithmetic with 8 bits of integer and 8 bits of fraction （8：8 notation） is a good start. Digital filtering is like auto racing：No matter how fast you can go， you would like to go faster. This observation suggests that optimization of filtering algorithms for speed of execution is always in good taste. For 8-bit microcontrolle...
  

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• 仿人类远程控制-I（Dynamic Animatronic Remote (Part 1)）　2008-09-08 12:23
  Build a Custom Controller with a Color LCD Peter built a custom controller that enables him to remotely control his animatronic systems. Each piece of hardware is controlled by a separate computer program. The remote polls his laptop and builds menus that show and control the state of each program. Every year， I put on an elaborate Halloween show in my front yard （see Photo 1）。 Being electronically minded，my fully automated show includes a talking skeleton and crow， sound effects， and mor...
  

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• 内容采集与显示（Content Collection and Display）　2008-09-02 11:00
  Build an Internet-Connected News Ticker James no longer has to turn on a TV or computer to get news updates. His innovative design retrieves news headlines from RSS feeds and constantly scrolls them across a dot-matrix LED display. The system checks for updates every 15 minutes When I first heard about WIZnet‘s iEthernet 2007 design contest， I was really excited about all of the possibilities an integrated Ethernet chip would open up to smaller microcontrollerbased systems. I knew there were t...
  

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