Motion Activated Trash Can
Use an ultrasonic sensor and an Arduino to learn how to make a motion activated trash can lid! Just toss some trash at it and it automatically opens for you! Not only will you learn about ultrasonic waves, distance detection and microcontrollers, but you will also learn how to make a pretty practical device! There's a lot to do, so let's get tinkering!
You can also find out more about ultrasonic devices and concepts by watching my previous videos: