Four short links: 20 August 2009

DIY SPY, Screencasting, Social Network Analysis, Term Extraction

  1. DIY SPY – a homebrew 2.4GHz wi-fi spectrum analyzerAs proof of concept (and a cool toy for anyone who has one of these lying around), I have implemented a working Wi-Fi spectrum analyzer on TI’s ez430-RF2500 development kit ($50), a 2-part USB dongle which consists essentially of a CC2500 radio strapped to an MSP430 low-power microcontroller (detachable bottom half) and a USB interface which enumerates as a virtual serial port (top half). The top half doubles as a standalone MSP430 programmer, so this kit is a great cheap way to get started playing with them. (via joshua on Delicious)
  2. ScreenrInstant screencasts for Twitter. Flash-based, uploads to their site and tweets the URL. The whole “for Twitter” thing is going a little too far: who records screencasts only for Twitter? It’s like having a spellchecker only for three-letter words.
  3. Social Network Analysis in R — video and slides for talk on doing social network analysis with R.
  4. We’re Keeping the Term Extraction Service — Yahoo!’s useful API gets a stay of execution. OK, we heard you. You’ve made it clear to us that shutting down the Term Extraction Service would be a mistake. So, we’ve changed our plans. We’re leaving the service up and running indefinitely. (via Simon Willison)
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  • > It’s like having a spellchecker only for three-letter words.
    Well, that could be useful if you had an old-school arcade machine high-score table you were trying to write a message on…

    –Philip.