While it’s not radar, subbing in ultrasonic sensors is how [Dzl] built this ... [Dzl]’s write-up has all the details you’ll need. If real radar is still your thing, though, we’ve got ...
While a well-known use of this is sonar, ultrasonic sensors ... which shows the data in real-time and maps out the location of all of the objects around the sensor. With some upgrades to the ...