One day I was talking to a colleague of mine and we realized that when we drink to much coffee in the morning and the atmospheric pressure is too low, the chances that we get a higher blood pressure are dramatically increasing. This is also true for those who suffer from heart diseases. I wondered if I could 3D print a relative pressure barometer that could show at least pressure differences around the average pressure.
So after a simple discussion, I felt I was challenged to build something like this so I came up with this simple and cute design.
The stl files can also be downloaded from here: