Forget radar, use lasers instead. Soon you can buy low-cost high-tech LIDAR sensors for your robot projects!
Now you can include a computer in your project super cheap!
The future doesn’t need builders and mechanics, everything will be built by robots!
With a magnetometer you can detect the existence and location of a magnet several inches away, perfect for so many robotic projects. You can even use it as a non-contact joystick as demonstrated it the video below this one:
Next time you want something to move, consider doing it with soft and flexible artificial muscles.