Instead, it relies on an ultrasonic distance sensor to detect a hand (or foot) waved in front of the door. An Arduino Leonardo runs the show, sounding a buzzer when the ultrasonic sensor is triggered.

The latter application pushed Tesla to develop new sensors, or new ways to hide the sensors, because CEO Elon Musk didn’t like the idea of a visible sensor in the middle of a door. He said when ...

Qualcomm has announced its new 3D Sonic Sensor Gen 2 ultrasonic sensor for in-display fingerprint readers. The new sensor is 77 percent bigger and 50 percent faster than the old models, and it ...

Qualcomm has unveiled the 3D Sonic Sensor Gen 2 with a larger ultrasonic fingerprint reader area and much-improved performance.