Well, it finally happened.

Few minutes before deadline, project files are being uploaded to github, video to youtube (its hell slow when you are hurry) and our tricorder is finally done.

What went wrong:

I'm not happy with I2C sensors, communication on I2C bus somehow flaky. However spectral analyser (with acoustic, magnetic and light input) works as expected, as well as Geiger counter. LEDs blinks, so the project is OK, at the end of the day ;-)