RCWL-0516 Microwave Motion Sensor Module

The RCWL-0516 is a microwave-based motion detection module that uses Doppler radar technology to detect movement. Unlike traditional PIR sensors, it actively emits microwave signals and detects changes in the reflected signal caused by moving objects. This allows it to detect motion through certain non-metallic materials such as plastic, glass, and thin walls. The module is compact, low-cost, and widely used in automation and security applications where reliable motion sensing is required.

Technical Specifications:

• Operating Voltage: 4V – 28V DC
  
• Operating Frequency: ~3.18 – 3.2 GHz
  
• Detection Range: 5 – 7 meters (up to ~9m adjustable)
  
• Operating Current: ~2.7 – 3 mA
  
• Output Voltage: 3.3V (HIGH), 0V (LOW)
  
• Output Drive Capability: up to 100 mA
  
• Transmission Power: 20 mW (typical), 30 mW (max)
  
• Trigger Time: ~2 seconds (re-triggerable)
  
• Detection Angle: ~360° (no blind spots)
  
• Operating Temperature: -20°C to +80°C

Features:

• Uses microwave Doppler radar for motion detection
  
• Detects motion through non-metal materials (walls, glass, plastic)
  
• Wide operating voltage range (4V–28V)
  
• Low power consumption suitable for battery-powered systems
  
• 360° detection coverage with no blind spots
  
• TTL digital output for easy microcontroller interfacing
  
• Adjustable detection distance and delay via external components
  
• Built-in 3.3V regulator output (can power small circuits)
  
• Optional CDS (light sensor) input for day/night control
  
• More reliable than PIR in high-temperature environments

Applications:

• Automatic lighting systems (smart lights, corridor lights)
  
• Security and intrusion detection systems
  
• Motion-activated switches and alarms
  
• Smart home and IoT automation
  
• Industrial motion sensing and monitoring
  
• Contactless switches and presence detection
  
• Embedded electronics and DIY projects