3 x RCWL0516 Microwave Radar Occupancy Sensor Modules Overview A set of three compact RCWL0516 microwave Doppler radar motion sensor modules designed for reliable occupancy and motion detection in electronics and automation projects. Each module gives a digital motion output that is easy to interface with microcontrollers and control circuits. Key benefits Reliable motion detection: Uses microwave Doppler sensing to detect movement, including small or slow motion, where passive infrared sensors may miss activity. Works through nonmetallic barriers: Can sense motion through glass, plastic, and thin walls, enabling concealed or remote mounting. Easy integration: Digital output and standard header pins make the modules simple to connect to microcontrollers, relays, and logic circuits. Compact and lightweight: Small PCB form factor fits into tight spaces and can be installed in prototypes, enclosures, or DIY housings. Low maintenance operation: Solid state sensing with no moving parts reduces maintenance needs for long term projects. What it does Each RCWL0516 module monitors a small field using microwave reflection and outputs a triggered signal when movement is detected. The output is compatible with typical microcontroller input levels and can be used to drive indicator LEDs, activate relays, or wake up control systems. Compatibility and interfacing Works with common microcontrollers and single board computers such as Arduino and Raspberry Pi by reading the digital output pin. Standard pinout allows easy wiring to power, ground, and signal lines. Suitable for use with relay boards, optocouplers, and input circuits for building automation, security, or robotics systems. Physical and performance attributes Model: RCWL0516 (pack of three modules). Form factor: Compact printed circuit board designed for throughhole header connections. Detection principle: Microwave Doppler radar for motion and occupancy detection. Output: Digital motion signal suitable for logiclevel inputs. Power: Designed for DC supply typical of small sensor modules. Installation: Mountable inside enclosures or behind nonmetallic surfaces. Materials: PCB construction with standard electronic components. Practical applications Automatic lighting control: Mount in corridors, closets, or stairwells to switch lights on when movement is detected and off after inactivity. Smart home and building automation: Use to detect room occupancy for HVAC or energy management systems, or to trigger scenes and alerts. Robotics and security: Integrate as proximity or motion detectors for mobile robots, alarm systems, or entry monitoring where throughmaterial sensing is useful. Why choose this module set The RCWL0516 modules provide a compact, electronic motion sensing solution that complements or replaces passive infrared sensors when detection through nonmetallic barriers or sensitivity to small movements is required. The set of three supports multiple sensing points or spare modules for quick prototyping and deployment. What to expect in the package Three RCWL0516 microwave radar motion sensor modules, ready for wiring and integration into electronic projects. Installation tips Avoid mounting behind thick metal panels which block microwave signals. Test placement and orientation to find the detection zone for your application. Use appropriate decoupling and signal conditioning when connecting to sensitive circuitry. This set of three RCWL0516 modules is suited for prototyping and small scale deployments that require compact, throughmaterial motion sensing and straightforward microcontroller interfacing.