I'm using this site to post various projects I've built or am building.
This project is intended to help provide better computer access for people who can't easily use common keyboards and mice. Similar commercial products use serial, USB and PS/2 ports and cost up to $450 or more, which seems like a rip off to me for such a simple device. By using Bluetooth allows this device to be paired with more than just a desktop computer. Devices like laptops, smartphones and tablets that support bluetooth HID profiles can also be used.
For theory of operation See:
I have a POV toy/sign I got from thinkgeek.com, I don't think they sell them any more... Anyway, I accidentally broke mine, and decided to fix it by making a new "propeller." I did the layout design in a CAD program running on Linux program called qCAD. I etched the board fairly easily using the Pulsar Profx "Contact Etch" method.
I wanted to implement an auxiliary external display on Linux. I looked at a few displays and found three that had reasonable prices. Unfortunately none of them came with open source software, they did however come with some working but pretty poor windows software. So to use these devices from Linux or any other OS in a specialized way, I would have to reverse engineer the signs to a certain extent. This page is basically a summary on how I reverse engineered the communication protocols for the three signs.
Miniature Antenna Tower Model with 4 Element Yagi-Uda and blinking lights.