This is so cool…Phillip cut a video cable and brought out the i2c lines that are used to transmit/receive data from the monitor/display. (I guess that’s how well designed drivers know the resolutions available)
Some drivers let you poke data onto this bus, so you now have a way to communicate with i2c devices (like, say…a wii nunchuk). PC’s also have an onboard i2c bus for sensors, which I mentioned in my blinkM post.
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Hey keen! Thanks for noticing. There’s a slightly more descriptive version (with additional pictures) here at Instructables:
http://www.instructables.com/id/Worlds-Cheapest-I2C-I-Squared-C-Adapter/
(And on a tangent, wow, the Wave Shield is exactly, Exactly, EXACTLY what I’d been seeking for another project! Just ordered one to mess around with.)