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object detection

Possibly helps to detect objects, walls and holes.
 Some fancy nice ultrasonic sensors can read multiple echoes of sent ultrasonic wave. Cheap senosrs register the first echo that arrived back. If we could listen … Read more
Navigate around via ultrasound
Using a
Hello everyone. My ultrasonic sensors arrived (4 in total) but instead of using them on my scrapbot, i found some 360 degree servos that i had gathering dust from a … Read more

how to make object detection sensor?

hi,

    I have succesfully made my first robot and now want to add an object detection and line following sensor. Which is the best sensor  for object detection and line following .Or somthing that can be home made.