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• 微带线技术（Microstrip Techniques）　2009-02-10 21:37
  What are microstrips and how are they used in PCB designs？Robert sheds some light on the topic of microstrips and describes microstripping techniques that you can use at your workbench. Welcome back to The Darker Side. This month， I am really a happy guy because I have achieved two of my goals. First， it should please my editors because I will present a subject in line with Circuit Cellar‘s monthly theme， which is， if you haven't read the cover， wireless communications. Second， the title...
  

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• 新的无线设备（Here Come the Wadgets）　2009-02-08 12:32
  As the catalog of wireless hardware options grows， so does the range of potential applications. This month， Tom introduces you to three new wireless gadgets， or "wadgets."There‘s something for everyone， from a mini-me Java machine to a wireless wire and everything in between. It‘s amazing to think that it's been a little more than 100 years since inventors like Marconi and Tesla pioneered wireless communication. What would the twentieth century have been like without it？ No radio. No TV. ...
  

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• 太阳能测量（Solar Measurements）　2009-02-09 10:50
  Techniques for Evaluating Panels Long ago， my buddy Eks observed： "If solar power is so good， why is there winter？" His excellent engineering judgment notwithstanding， photovoltaic （PV） panels appear everywhere these days： dark plates facing the sun from buildings， backyards， and even utility poles. Common performance numbers concentrate on the big picture with sweeping assumptions that might well not apply in a specific location. Although everybody seems to know the "kilowatt per squa...
  

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• 处理器改进（Processor Modification）　2009-02-07 15:39
  Put Soft-Core Processors to Work Want to change your processor？ No problem. Larry explains how to use the flexibility of soft-core processors to make the processor you want. For a while now， selecting a microcontroller for an embedded design has been a process of deciding which offerings yield the features you want and need. Having been involved in selecting processors for embedded devices， I know the frustration of trying to figure out which controllers have sufficient memory and peripherals...
  

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• 无线模块控制（Wireless Module Control）　2009-02-06 12:17
  An MCU-Based Irrigation Control System Tom describes a PIC-based prototype design for a wireless water control system for EarthBoxes， which are gardening boxes with water reservoirs and fertilizer strips for cultivating plants and vegetables. The scalable design can accommodate various multiple-box configurations. In this article， I will describe a prototype for a wireless water control system for EarthBoxes （see Photo 1）。 The design is scalable and can accommodate small to large quantities...
  

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• SD记忆卡选取--Ⅱ（Access SD Memory Cards (Part 2)）　2009-02-05 12:29
  Use the FAT File Format to Move Data Jeff concludes his introduction to SD technology with information about using the FAT file format to move data. He also describes how to create directories and file entries， and delete， save， and append data using ring buffers. Whether it is audio， video， graphic， database，system， executable， or any number of other file types， they can all be stored， moved， and copied from one storage medium to another， thanks to the operating system‘s ability t...
  

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• 功率转换--Ⅱ（Power Switching in the Real World (Part 2)）　2009-02-04 14:47
  Practical Switching Arrangements Steve continues his explanation of solid-state power switching by describing how to use a logic design to control real-world power. You can use his practical switching arrangements in your upcoming designs. Last month， I introduced the topic of solid-state power switching. I covered safety precautions， presented some rules of thumb， provided tips and tricks for safely dealing with high-power devices， and described some of the theory behind the actual power-sw...
  

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