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 adafruit wave shield, arduino, ultrasonic, ultrasonic distance sensor, wav shield ← Fabricate Your Own 7-Segment Displays Easy Capacitive Touch Sensors In Eagle → ...

This one is an unusual smart home project, potentially - how to monitor a fish tank’s health with an AI-enabled ultrasonic sensor system. The detailed project is highlighted on Hackser.io and features ...

SJEC-AICTE IDEA lab in collaboration with Department of Electronics and Communication Engineering (ECE) at St Joseph ...

Ultrasonic Fingerprint Sensor Using a Piezoelectronic Micromachined Ultrasonic Transducer Array Integrated with CMOS Electronics. Applied Physics Letters, 2015 DOI: 10.1063/1.4922915 ...