pxt-ev3/docs/tutorials/ultrasonic-sensor.md

Infrared sensor

Tutorials

[{
  "name": "Object Near",
  "description": "Detect if objects are near.",
  "cardType": "tutorial",
  "url":"/tutorials/object-near",
  "imageUrl":"/static/tutorials/object-near.png"
}, {
  "name": "Wall Follower",
  "description": "Follow a wall at a distance using the ultrasonic sensor and a proportional controller.",
  "cardType": "tutorial",
  "url":"/tutorials/wall-follower",
  "imageUrl":"/static/tutorials/wall-follower.png"
}]

See Also

Object Near?, Wall Follower