Hi, I will put some screenshots and some usage videos as soon as I can. Let me explain the project a bit, it is made of a firmware and a PC software. Both downloadable from the link: http://code.google.com/p/extrae/
. The firmware is a sketch for arduino that receives and send data to and from the pc. The host is a JavaFX data visualizer. From the host you can control the timing between measurements in the arduino (for analog meassures), the number of samples, the value and direction of a simple trigger to start taking samples, the interrupts for 4 digital channels (the 2 classical ones and 2 extra ones), etc... the idea is, in short: make an interface so that people can do experiments in physics (and other sciences) that would normally take expensive (or more expensive at least) hardware.
The host software also has a simple option to send the data through networking protocols (it is not very sharp and we hope to make it a lot better soon) so that, for example, when a student measures the rising in temperature of a glass of water being heated, an animation that particles gain movement while this raise in temperature is measured explains that temperature has a connection with change in kinetic energy.
The project itself is a good science project to be shown to student as arduino code is understandable and, if the functionality of different sensors can be explained, the student can also understand the hole process of sampling.
Hope this clarifies the idea a bit so that some people might test it...