Seeing as Arduino is good for controlling motors and sensors, Randy added a PING ultrasonic sensor to the front of the vehicle too.

The robot's eyes and ears are provided by an ultrasonic sensor and an infrared sensor, both of which can probably be purchased from electronics hobby stores. Or you can also make your own, for ...

Honestly, if it weren’t for the ultrasonic distance sensor protruding from the spherical body, you might think that the entire robot was just a little Wiffle ball.

Modern RC cars can be pretty darn fast. That’s fun and all, but it also makes it easy to crash them into things. This problem ...

Designed for kids ages 8 and older, it includes an ultrasonic sensor, a tracking sensor, the main control box, and more parts, all of which are are color-coded and labeled clearly.