Now, the venerable ultrasonic sensor joins the gallery of classics given a size change treatment, like the 555 timer we’ve seen two different takes on, or perhaps that one Arduino Uno.

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.

For years, ultrasonic sensors have been used in a wide range of applications including fish finders, parking sensors in cars and burglar alarms. In this article, we describe the characteristics of ...

This Ultrasonic Sensor Circuit consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. When something moves in the area covered the circuit’s fine balance is ...

Proximity sensors that use ultrasonic sound waves calculate distance to an object using the time it takes to receive the echo from an ultrasonic burst.

Because of the always-on presence detection capability of the MEMS-based ultrasonic sensor, new use cases also emerge. Smart speakers that wake up as a person approaches to listen for an ...

Ultrasonic sensors are up to the task: They use the propagation time of sound to track objects, so their performance is unaffected by color or glossiness. Their evaluation pulses easily penetrate ...

The Pixel 9 series is now rumored to adopt an ultrasonic fingerprint sensor. Since the Pixel 6's switch to an under-display fingerprint ...