RCWL-0516 Microwave Radar Sensor Switch Module

Key Features:

✔ Microwave Radar Detection – Uses 3.18GHz Doppler RF (not IR/ultrasonic). ✔ Penetrates Non-Metallic Materials – Detects motion through thin walls, glass, or plastic. ✔ Adjustable Sensitivity & Time Delay – Tune via onboard potentiometers. ✔ Digital Output (High/Low) – 3.3V logic (compatible with Arduino/RPi). ✔ Wide Voltage Range (4–28V DC) – Works with 5V/12V/24V systems. ✔ Auto-Repeat Trigger Mode – Continuously detects motion (unlike HC-SR501 PIR).

Applications:

• Automatic Lighting – Staircase lights, bathroom fans.

• Security Alarms – Intruder detection (works in darkness/fog).

• Vehicle Sensing – Driveway alerts, garage door openers.

• IoT Automation – Trigger smart home devices.

Wiring Guide:

• VIN → 4–28V DC (e.g., 5V Arduino or 12V adapter).

• GND → Ground.

• OUT → Digital input pin (e.g., Arduino D2).

• CDS → Disable sensor in daylight (optional LDR connection).

Technical Specifications:

• Detection Range: 5–7 meters (adjustable).

• RF Frequency: 3.18GHz (±75MHz).

• Output Signal: 3.3V TTL (HIGH when motion detected).

• Time Delay: Adjustable (0.5s–30s via potentiometer).

• Operating Temp: -20°C to +80°C.

Package Includes:

• 1x RCWL-0516 Radar Sensor Module.

Why Choose the RCWL-0516?

✅ No Line-of-Sight Needed – Detects motion around corners/through barriers. ✅ No False Triggers – Immune to pets, wind, or temperature changes. ✅ Low Power – Draws <3mA (ideal for battery projects).

Note: