Archive for the 'Technology' Category

Sheryl and I painted a his (blue) and hers (red) Z-Scale trucks.  The size and printing capabilities were previously covered in Part 1. The models were washed in a soapy bath before painting.  The plastic were not primed beforehand, but we plan to spray with white primer coat the next go around. The 3d printing [...]

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A couple weeks ago we visited a local hobby shop called Penn Valley Hobby Center  in Lansdale, PA.  Walking around the aisles flooded me with memories of my youth gluing together plastic models and rockets.  The shop specialized mostly in trains and they carried a size called N-Scale (1:148) which is the smallest I have ever seen. [...]

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I’m an iPhone 3GS owner. My iPhone is my first Apple product and my first phone with a data plan. When I purchased it in November 2009, it was undoubtedly the best phone on the market; things have changed. Hardware-wise, the iPhone 4 is in the top of its class. While I believe the iPhone [...]

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I have been using a rather expensive remote (gyration) for my home theater for a while and one of the buttons failed. Most remotes have a conductive pad under the rubber buttons that contacts a pattern on the printed circuit board (PCB) inside to form a switch. A dirty pad or contact is the most [...]

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After spending a few months bonding with my Nokia N85, I now feel comfortable providing a follow-up review of the phone. It’s good news: the honeymoon is not over. Overall I am impressed with the quality of the phone itself, as well as the quality of pictures and video. And the OLED screen still elicits [...]

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Revenge of the permalink errors.  A had a similar problem happen when I upgraded to 2.7.1, which I posted about here. Downgrading to WordPress2.7.1 was really simple: Download the previous version. Drag the files into your WordPress installation directory. Log-in into the admin menu. WordPress will request to automatically update your database. Agree to the [...]

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This article covers chapter 5 of my dissertation.     - Single-Phase Grid Connected Control     – Direct Digital Synthesis     - All Digital Phase-Lock Loop     - Software and Hardware in the Loop Experiments     – Rapid Control Prototypes and System Products  G. Pitel, “Fast power converters and rapid digital design,” UILU-ENG-2008-2509, CEME-TR-2008-02, December 2008, pp. 92-109.   

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Good news, my transactions was accepted–which means I can start letting dissertation chapters  trickle out into Internet land. Enjoy. This article covers chapters 1 and 2 of my disstertation. These chapters cover: – Dissertation Introduction – Voltage Source Buck Converter Modeling – Boost Converter Modeling – Voltage Source Inverter Modeling G. Pitel, “Fast power converters [...]

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23660 In an effort to make my life easier I decided to put PitelSPOT on its own dedicated server. In the past, all my web applications were run from my workstation, which has obvious disadvantages. I appologize to all those cutoff mid-article because I was doing some routine MATLAB/Vista reboot.  I wanted to share the [...]

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I decided to post my University of Illinois doctorate dissertation. If you have questions, please leave a comment below so we can have open discussions. This dissertation applies large-signal and time-domain models along with digital control to achieve fast control performance and to quickly test/design multi-block power controllers. Fast controls are needed for motherboard level [...]

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