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http://www.quinnnorton.com/said/?tag=northpaw

Quinn Norton had a good series on it. There's also a longer talk by her about body hacking in general online.

It's an interesting frontier, but I don't have any good resource that has continual updates on it. Any recommendations? The only other place I've really seen stuff about it is BME Zine, but it's focused on BME in general, so there's a lot more noise than signal.

I don't get why it has to be so bulky! Surly there's a better way of implementing this that's actually closer to the true meaning of "anklet" - I'd be genuinely interested in wearing something like this as I have a great memory for maps but a completely abysmal sense of direction.

I've seen something like that on BBC Horizon. The idea was to give this to a blind person to help with navigation.

BTW, I'd like to know if a single buzzer is enough for this purpose - vibrate stronger as the angle north gets smaller. I'm quite sure human would be able to quickly learn this. Or maybe a combination of two buzzers.

BTW', I don't need to mention that I had similar idea to Indoor Atlas http://www.indooratlas.com/technology.html (but of course, ideas don't matter only execution)