iPhone OS 3.0 GM Seed

Earlier this week Apple made available the iPhone OS 3.0 GM Seed (build 7A341). It's the best build to date. Compared to the previous build, E*Trade's Mobile Pro application now works without crashes. Apple have also implemented one of my feature requests - the ability to retain the order of application icons between restores. So this upgrade was the smoothest of them all.

Apple have also provided an iTunes redemption code to pre-test a version of AOL’s AIM that makes use of the push notification service.

In the iPhone’s Settings page, push notifications can be controlled globally as well as for individual apps:

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Migrating from Palm Calendar to Google Calendar and iPhone

Here are the free steps to migrate from Palm's date book (or Pimlico's DateBk6 ) calendar to Google calendar for full iPhone sync. First, sync Palm with Palm Desktop . Next, open Palm Desktop, select the Calendar view, navigate to File | Export, select Export Type as Date Book Archive, Range as All and provide a file name. This will export the calendar data as Date Book Archive (.dba). There's a paid tool called DBA2CSV that converts .dba files to .csv files. However this can be done for free using Yahoo Calendar. Login into Yahoo Calendar and via Settings/Import, import the .dba file. It helps to have an empty Yahoo Calendar. Via Settings/Export, export the calendar as .csv file. Login to Google Calendar (also works with Google Apps For Your Domain GAFYD Calendar) and import the .csv file into any of the calendars. It is a good idea to create a test calendar and test the import before importing into your real calendar. That way if anything goes wrong, you can delet...

AD-5526 Digital Multimeter

The AD-5526 is an ancient multimeter from A&D but for $10 one can’t complain. Has all the basic features one would expect from a multimeter and at 5.2 cm X 9.5 cm X 2.6 cm, it’s quite compact. Uses a LRV08 12V alkaline battery – not a common battery in the USA.

RTL-SDR, Raspberry Pi and Plane Spotting via ADS-B

Most modern aircraft carry an ADS-B ( Automatic Dependent Surveillance - Broadcast ) transmitter that puts out information about the aircraft's identification, geospatial location, speed, and heading. This information is received by ground stations and air traffic control and used as a replacement for radar-based tracking. ADS-B relies on line-of-sight communication via signals transmitted at 1090 Mhz and has a range of up to 250 nautical miles. Sites such as FlightAware , FlightRadar24 , Plane Finder , RadarBox24 , etc. collect ADS-B information using a vast array of ADS-B receivers, some of which are run by hobbyists, and present this information on maps with near-real-time updates. With the advent of cheap software-defined-radio (SDR) dongles, over the past few years, it has become extremely cheap and easy for amateurs to receive ADS-B signals, upload data to these sites and, in exchange, get access to premium features from these sites. This guide will walk you t...

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