3 ms·

Going to move up and down with every bump and pothole

• adrianmonk 5mo ago
  Have a rod that pivots in its center and has objects of equal mass at each end, like a balanced seesaw. But make one of the objects very low density (less than water) and other high density. Since the densities differ, water will cause the rod to rotate. But since the masses are the same, bumps will create no net torque around the pivot point and thus no rotation. ASCII art diagram: F------(x)------C (x): pivot point F: float C: counterbalance Also include a small spring to keep the float in the down position. I'm sure there are other ways like sensing the electrical resistance of the water. Or just let the float sensor bounce. It's underwater when it stops bouncing and is continuously in the up position.
  • esseph 5mo ago
    > Or just let the float sensor bounce. It's underwater when it stops bouncing and is continuously in the up position. Road grime, break dust, grease, grit, etc will contaminate the shaft and make it stick, potentially telling you that youre: A) Never in water Or B) Always in 2.5" of water because the sensor is stuck.
    • aitchnyu 5mo ago
      I surrender my speedometer ceremony for the wade sensor. Instead of a motor sweeping the speedometer from 0 to 200 on startup, put the motor to sweep the wade sensor.