Microwave Motion Detection Sensor (RCWL-0516)

Overview

The RCWL-0516 Microwave Motion Detection Sensor is a compact and powerful Doppler radar module that detects motion through walls, plastic, glass, and other non-metallic materials. Unlike passive infrared (PIR) sensors, the RCWL-0516 is not affected by heat or ambient temperature, making it a reliable choice for security systems, automation, and presence detection. Its high sensitivity and adjustable range allow for flexible integration into a wide range of projects, from DIY home automation to advanced robotics.

Key Features

• Doppler Radar Technology: Detects motion through walls and non-metallic materials, unaffected by heat or light.
• Wide Detection Range: Detects movement up to 5-7 meters with a 360° field of detection.
• Adjustable Sensitivity: Onboard potentiometer to fine-tune detection distance.
• Low Power Consumption: Operates at 3.3V-5V with minimal current draw, ideal for battery-powered projects.
• Simple Interface: Digital output (HIGH when motion detected) and repeat trigger mode for continuous detection.
• Compact Design: Small form factor (approx. 20x20mm) easily integrates into breadboards and enclosures.

Technical Specifications

• Operating Voltage: 3.3V - 5V DC
• Operating Current: ~3mA (typical)
• Detection Range: 5-7 meters (adjustable)
• Detection Angle: 360° (omni-directional)
• Output Signal: Digital HIGH/LOW (TTL level)
• Operating Frequency: 3.18 GHz (microwave)
• Trigger Mode: Repeatable trigger (default)
• Dimensions: 20mm x 20mm
• Weight: 3g

Applications & Use Cases

• Security Systems: Motion-triggered alarms, intruder detection, and surveillance systems.
• Automation: Automatic lighting, smart home devices, and energy-saving switches.
• Robotics: Obstacle detection, human-following robots, and interactive installations.
• Presence Detection: Room occupancy sensing for HVAC or lighting control.
• Interactive Art: Touchless interfaces and gesture-based displays.

What's Included

• 1x RCWL-0516 Microwave Motion Sensor Module

Compatibility

The RCWL-0516 works with any microcontroller that has a digital input, including Arduino, ESP32, Raspberry Pi, and STM32. It can be powered directly from the 3.3V or 5V pin of your board, and the output can be read as a standard digital signal.

MOKWN Recommendation

For Egyptian makers, the RCWL-0516 is an excellent alternative to PIR sensors, especially in hot climates where temperature changes can cause false triggers. Its ability to detect through walls makes it perfect for discreet security installations. Pair it with an ESP32 or Arduino for a quick and reliable motion-sensing project. We recommend using a voltage regulator if your power supply is unstable.