Herein, millimeter-wave radar systems for helicopter all-around obstacle detection are proposed. These systems detect and avoid obstacles to ensure flight safety. First, the configuration of a 24 GHz ...

Pedestrians distracted by smartphones are easy to meet with various dangers when crossing or walking on the street, such as the obstacles on the sidewalk (e.g., temporary parking and road repairing).

PID-based one-axis ball balancing robot using Arduino. Uses an ultrasonic sensor and servo motor to stabilize a ball at a target distance. Real-time tuning of Kp, Ki, Kd via Serial. Includes stability ...