This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose ... The set-up process is very simple, ...

[Eduard] chose the latter, and also included obstacle avoidance sensors in the process. We’ve seen quite a few that use these ultrasonic rangefinders. He decided to go a different route by ...

One of the essential parts of any home security system is a door detector that lets you ... The system here uses a cheap Arduino board, a few sensors, and a magnetic contact switch.

An ultrasonic sensor is positioned outside the box to detect the presence of a hand within a four-inch range. Upon sensing an obstacle, it then sends a signal to the Arduino UNO, which ...

To supply targeting data for the launcher, an Arduino Uno uses an ultrasonic ... of the sweeping sensor, a missile is fired using the dart launcher. It’s a relatively simple build, but ...