Cars built after 2012 : tyres must now be fitted with pressure sensors by law. This circuit can monitor and alert when the pressure is too low, high or nicely acceptable.
2.1 BAR = 30 psi. L for low... blue
2.6 BAR = 37 psi H for high ... red
Green....O for OK between those set pressure values. (my car values)
You can set the Low value at the bottom left V source and set the High value at the bottom right V source.
Now alter the middle V source to simulate the tyre BAR pressure.....see the alerts change.
You could use this setup to set and monitor other things such as revs/min or speed limit alert, or blood pressure etc. It is based on the 'window voltage' method using two op-amps and a few simple components.
(re-listed here after minor alteration).
