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.

Posted in Arduino Hacks Tagged arduino, bubble sort, coronavirus, servo motor, social distancing, ultrasonic distance sensor, ultrasonic sensor ...

40-KHz ultrasonic transmitter and receiver pair (40T/R-B/W) Schematic of the HC-SR04 module Get to the point In truth, my intent is not to provide a new translation of some well-worn “Arduino & ...

A new ultrasonic fingerprint sensor measures 3-D image of your finger's surface and the tissue beneath it -- enhancing biometrics and information security for smartphones and other devices ...

Google has just launched the new Pixel 9 series and the core series includes an upgraded ultrasonic fingerprint sensor.

Qualcomm has partnered with Katouzian to announce the world's first 3D ultrasonic in-display fingerprint sensor for mobile devices. Here's what you need to know!