Arduino Wall-Penetrating Motion Sensor Using The RCWL-0516 Microwave Radar Module — Maker Portal
CQRobot Ocean Microwave Motion Sensor with 10.525GHz Doppler Effect, Compatible with Raspberry Pi and Arduino Board. for Industrial, Measurement, Automatic Doors, Sensor Lights, Reverse Radar etc. : Amazon.de: Business, Industry & Science
The Right Circuit Turns Doppler Module Into A Sensor | Hackaday