Jealous of your Nexus S-owning friends and their fancy NFC chips after yesterday's Google Walletannouncement? Well tech tinkerer Joe Desbonnet has whipped up what he dubs "poor man's NFC" using an Arduino, some magnet wire, and any compass-equipped Android smartphone (which is almost all of them). By placing a coil of wire on the phone and connecting it to the DIYer's favorite microcontroller, Desbonnet was able to send data, albeit very slowly, to his HTC Desire running a special app to decode the signals. Granted, you're probably not going to see American Eagle mod their point of sale systems to talk to your phone's magnetometer, but it's still a neat trick. In fact, we'd break out our Arduino right now to give it a try, but our secret lair is strangely devoid of enameled copper wire. Check out the source link for instructions, and don't miss the video after the break.
Pentax's Optio WG-1 GPS point-and-shoot satisfied geotaggers out of the box, but owners of its K-5, K-r and 645D DSLRs have had to make do with third-party taggers like the PhotoTrackr or Eye-Fi. The new hotshoe-mounted O-GPS1 module fixes that oversight by recording latitude, longitude, altitude, Coordinated Universal Time and shooting angle. Everyday snappers might find an extra hotshoe attachment cumbersome, but astro-photography enthusiasts could well be enticed by the device's interesting "ASTROTRACER" function. This helps you take clearer photos of celestial bodies by using the in-built sensors to calculate a star's movement and then employing the camera's shake reduction system to compensate. Sounds clever, but be advised: this module is only for Pentax DSLRs -- and only for very specific models at that. You'll get full functionality with the K-5 and K-r cameras, and geotagging (no ASTROTRACER) with the 645D. Oh, and you'll need to make sure yo
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