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 ...

Being able to measure ducted airflow cheaply and non-intrusively, like with this ultrasonic ... HC-SR04 sensor boards and has already done a proof-of-concept build. He’s getting real numbers ...

The ultrasonic technology enables 4-in-1 combined sensor operation. The instrument is suitable in binary gases for medical ventilators, assisting in the global pandemic that has resulted from the ...