Bluetooth input device using an orientation sensor
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![](/items/UltrasonicHeadtrackerMouse-zy9-thumb.png)
![](/items/UltrasonicHeadtrackerMouse-zy9-thumb.png)
Headset for the Prente-Romiche Headmaster
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![](/items/HeadMountedLaserPointerCommunicator-85k-thumb.png)
![](/items/HeadMountedLaserPointerCommunicator-85k-thumb.png)
This design shows how to build a head strap mounted laser pointer.
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