Build a model Mars lander that uses an ultrasonic sensor to measure the distance to the ground as it descends with a parachute

Use an ultrasonic distance sensor and servo motors to make a model planetary lander deploy its landing gear using an Arduino in this engineering project.

Design glasses with a built-in distance sensor and buzzer to warn blind people of an approaching obstacle.

Build an obstacle-detecting walking stick to provide an audible warning for visually impaired users.

Learn how to the PING))) ultrasonic distance sensor from Parallax, also called a sonar sensor, with an Arduino to measure the distance to a target object. Visit the Science Buddies website for cool science projects you can do with an