The HC-SR501 PIR Motion Sensor detects human movement using passive infrared technology. With adjustable sensitivity and delay time, it is perfect for smart home lighting, automatic doors, security alarms, and school/college robotics projects. Fully compatible with Arduino, ESP32, STM32, Raspberry Pi, and home automation systems.
⭐ Accurate Human Motion Detection
- Detects body movement using passive infrared (PIR) sensing
• Ideal for indoor automation and security systems
⭐ Adjustable Sensitivity & Delay Time
- Range adjustable up to 3–7 meters
• Delay time adjustable from 5 sec to 300 sec
⭐ Microcontroller Friendly
- Works with Arduino, ESP32, Raspberry Pi, ESP8266, PIC, STM32
• 3.3V & 5V output compatible
⭐ Energy Efficient Operation
- Automatically activates devices only when motion is detected
• Perfect for lights, fans, alarms, and smart IoT triggers
⭐ Plug & Play Design
- On-board voltage regulator
• Detection angle ~120° with stable performance
Technical Specifications:
- Model: HC-SR501
- Operating Voltage: 4.5V – 20V
- Output Type: Digital HIGH/LOW
- Detection Distance: 3 – 7 meters (adjustable)
- Detection Angle: ~120°
- Delay Time: 5 sec – 300 sec (adjustable)
- Sensitivity Adjustment: Yes
- Operating Temperature: –15°C to +70°C
- Interface Pins: VCC, OUT, GND
- Dimensions (L×B×H): approx 32 × 24 × 25 mm
- Weight: approx 18g
