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 ...

It seems the same is true for [James Bruton]’s impressive Sonic the Self-Balancing robot ... (for him), but the sensor integration for uneven surfaces turned out to be a real challenge, and ...