Data logging football

[Ben Kokes] threw together a hardware package to capture data from a football. In the center of a Nerf football he made room for an accelerometer, gyroscope, and an electronic compass.  All three can capture 3-axis data and, along with the LEDs ringing the circumference, they’ve controlled by an XMEGA192 microcontroller.

This makes us think back to a time when baseballs with a built-in speed sensor first hit the market… does this hack have mass marketing potential? Perhaps, but only if the $225 sensor price tag were greatly reduced. When we first started reading the description we hoped that [Ben] had coded an interpreter that would render 3D playback video from the data. He hasn’t done that, but from the data graphs he did assemble we don’t think that functionality is out of the question. We’ll keep our fingers crossed.

Haptic compass

north

[eric], inspired by this Wired article, built his own haptic compass. Named “the clown belt”, it is a belt with 12 little vibrating motors mounted evenly all around. A digital compass vibrates whichever motor is closest to north at all times. This basically gives the owner an extra sense.  He doesn’t go much into his own experiences, but the Wired article mentions “dreaming in north” and feeling strange once they finally removed it. Precise direction senses may not be super power worthy, but they would be cool.

[thanks cnelson]

T-Mobile G1 teardown

g1teardown

In our Dev Phone 1 excitement last week, we somehow overlooked phoneWreck’s teardown of the T-Mobile G1. The complex slider mechanism is certainly worth looking out. One of the major oddities they point out is the inclusion of two vibration motors. One is mounted next to the SIM on the mainboard. While the other is mounted in the frame next to the earpiece. We wonder what was gained/solved by using two. The phone also includes a digital compass module. We’d like a more detailed explanation of how the Xilinx CPLD is used. From this article in 2006, it seems HTC uses them to generate custom clock signals and switching off devices for power management.

Wearable haptic devices bestow sixth senses


Engadget recently posted a story about a flexible tactile display that can be wrapped around any part of the body and give haptic feedback to the user. The research team from Korea’s Sungkyunkwan University that developed the device are focusing on applications like Braille for the visually impaired or transmitting tactile data to a remote user, but this is just the beginning; the applications for wearable haptic feedback are wide open.

[Read more...]

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