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In the presentation titled "Flying Robot: Unmanned Aerial Vehicles Using Ruby and Arduino" at the LA RubyConf 2009, an unknown speaker introduces the world's first Ruby-powered autonomous blimp. The talk emphasizes the integration of Ruby programming with open-source hardware, specifically the Arduino platform, to create autonomous flying vehicles. Key focus points include:

- **Overview of Project**: The project began six weeks ago, combining the efforts of the Ruby programming community and the Arduino hardware community.

- **Physical Computing**: The concept of physical computing is introduced, explaining how computers can interact with the real world by controlling hardware.

- **Arduino and Ruby Integration**: A Ruby domain-specific language called Rag was developed for programming Arduino microcontrollers, which facilitates communication with external devices.

- **Architecture of the Flying Robot**: The speaker elaborates on the architecture, describing the components such as the Arduino board, XB wireless radio frequency modem, and hardware plugins for various sensors and systems.

- **Live Demonstration**: The highlight of the presentation is a live coding session, where the speaker codes an Arduino sketch to control the flying robot while addressing challenges encountered during the flight tests, including stability issues and weight limitations.

- **Wireless Communication**: Details about the XB modem's role in enabling wireless programming and communication with the flying robot are explained.

- **Building the Flying Robot**: The process of creating a flying robot from scratch is outlined, showcasing the development timeline, costs, and learning experiences related to hardware and coding.

- **Future Projects**: The speaker discusses future endeavors such as creating a standalone ground control station using a joystick with Arduino, as well as making the Flying Robot software available via GitHub for public use.

The key takeaway is that with open-source hardware and software, anyone can create their own flying blimp or UAV, promoting creativity and learning in physical computing and automation.

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