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 HC-SR04 module includes ultrasonic ...

While it’s not radar, subbing in ultrasonic ... detection project, with some slight modifications to tap into the received audio signal rather than just using the digital output of the sensor.

To supply targeting data for the launcher, an Arduino Uno uses an ultrasonic ... If an object is detected in the 180-degree field of view of the sweeping sensor, a missile is fired using the ...