The set-up process is very simple, and best understood by referring the wiring diagram. If everything goes right,you should see the burning eye of the red LED when there is no object in the safe-zone ...

Samsung’s in-screen ultrasonic fingerprint sensor is pretty easy to set up. Just follow these steps. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

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.

To supply targeting data for the launcher, an Arduino Uno uses an ultrasonic sensor pair mounted atop a servo. ... I always wanted to set this up and never got around to it.