Inside the light is an Arduino Nano, which reads from the ultrasonic sensor mounted underneath the enclosure and lights up the appropriate LED depending on the car’s distance.

It has become a common sight, a must-have feature on modern cars, a row of ultrasonic sensors embedded in the rear bumper. They are part of a parking sensor, an aid to drivers for whom depth percep… ...

Tesla has announced that it's dropping ultrasonic sensors from the Model 3 and Model Y, and its more expensive cars will lose them starting next year. And that means Tesla has to temporarily ...