RCWL-0516 Microwave Radar Motion Sensor Module – Doppler Radar Induction Board for Arduino & ESP32 in Pakistan

Overview 

The RCWL-0516 is a mini Doppler radar motion sensor module that uses microwave induction technology. Instead of detecting infrared radiation (heat), it emits a low-power microwave signal and measures the frequency shift of the reflected signal to detect movement. Because it uses 3.2GHz radio waves, it features 360-degree detection and can be completely hidden inside a plastic project box or behind a wooden panel without losing sensitivity.

Key Features

• Through-Wall Detection: Can detect movement through thin walls, glass, and plastic—ideal for “hidden” security projects.

• 360° Sensing Area: Unlike PIR sensors which have a “blind spot,” this radar sensor provides a full spherical detection zone.

• Wide Voltage Range: Operates smoothly from 4V to 28V, making it compatible with almost any power supply.

• Stable Performance: Less prone to false triggers from sunlight, wind, or ambient temperature changes compared to traditional PIR sensors.

• Adjustable Parameters: Features solder pads on the back (C-TM, R-GN, R-CDS) to customize trigger time, sensing distance, and light sensitivity.

Technical Specifications 

Feature	Specification
Operating Voltage	4.0V to 28.0V DC
Operating Current	~2.8mA (Typical)
Sensing Distance	5 to 7 Meters
Transmitting Power	20mW (Typical) / 30mW (Max)
Output Voltage	3.3V (High) / 0V (Low)
Output Drive Capacity	100mA
Operating Frequency	~3.18 GHz