Every year, around this time the final projects for "Designing with Microcontrollers" at Cornell are posted and I get to pour through looking for ideas and trying to get the benefit of the dozens of all-nighters that went in to most of them.
There was one project i had to read first, Robert Clain and Miguel Salas created a "fart intensity detector".
There's a video interview of with the creators and and demo of the unit in "simulation mode" (mp4)
from their Introduction ...Their section on related patents may need to be more closely examined, it's hard to believe that this could be the first device to sense and comment on flatulence.
The inspiration for this project was to determine who could generate the worst flatulence measurable in a personally unbiased manner. To do so, however, requires measuring the intensity of these emissions. Therefore, a multitude of sensors were used in conjunction with a microcontroller to coordinate and analyze these sensor readings.
further in ...
The final stage is the output stage, or User Indication stage, where the user is told of its fart intensity ranking through speech, LCD display and a beeping to indicate the user the level of danger, with beeping of varying frequency. A fan would turn on only for the specially dangerous farts: Those with rankings of 7, 8 and 9.
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