2 ms·

$30 can buy a cheap bluetooth webcam that could do the same job (given that you have a ... laptop on your car), but cool nonetheless.

• mhb 19y ago
  How would that give you the range to an arbitrary object - like a white wall?
  • trekker7 19y ago
    good point but in how many real world situations is this going to be an issue? for situations like measuring distance to a car while parking, a camera works well.