Description
The RCWL-0516 Radar Sensor detects moving objects using a 3–5.8 GHz microwave Doppler radar. Unlike PIR sensors, it can detect motion through walls and thin materials. The module outputs a digital HIGH signal when motion is detected and includes an onboard potentiometer to adjust sensitivity. It operates with low power and is compatible with microcontrollers like Arduino, ESP32, and Raspberry Pi, making it suitable for security alarms, automatic lighting, robotics, and home automation projects.
Key Features
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Detects motion using Doppler microwave radar
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Can sense through walls and thin objects
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Digital output signal for easy microcontroller interfacing
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Adjustable sensitivity via onboard potentiometer
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Low power consumption, compact and breadboard-friendly
Specifications
| Feature | Details |
|---|---|
| Operating Voltage | 4–28 V DC |
| Output | Digital (HIGH on motion) |
| Detection Range | 5–7 meters (typical) |
| Frequency | 3.18–3.45 GHz |
| Current Consumption | 3–5 mA |
| Dimensions | 32 × 16 × 7 mm |
Applications
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Automatic lighting systems
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Motion detection alarms
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Home and office security
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Robotics and automation projects
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IoT smart devices
Compatible Boards / Circuits
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Arduino (Uno, Nano, Mega)
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ESP32 / ESP8266
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Raspberry Pi (with GPIO input)
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Can interface with LEDs, buzzers, relays, and other output devices
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