HC-SR501 PIR Motion Sensor Module – Human Presence Detection for DIY Automation

🚶‍♂️ HC-SR501 PIR Motion Sensor Module – Human Presence Detection for DIY Automation

The HC-SR501 PIR (Passive Infrared) Motion Sensor Module is a widely-used and cost-effective solution for detecting human movement in its sensing range. It works by sensing infrared radiation emitted by warm objects such as the human body and outputs a digital HIGH signal when motion is detected.

This module is ideal for Arduino, ESP32, Raspberry Pi, and STM32 projects, and is extensively used in security systems, automatic lighting, smart appliances, and robotics. It features adjustable sensitivity and delay time, allowing you to fine-tune its behavior for various applications.

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✅ Key Features:

• 📡 Sensor Type: Passive Infrared (PIR)

• 🔄 Output: Digital (HIGH when motion detected)

• 📏 Detection Range: 3 to 7 meters (adjustable)

• 👁️ Detection Angle: ~120° cone

• ⚙️ Adjustable Settings:

  • Sensitivity: Distance range

  • Delay Time: 5 seconds to 5 minutes

• 🔌 Operating Voltage: 4.5V – 20V DC

• ⚡ Output Voltage: 3.3V logic HIGH level (compatible with 5V/3.3V systems)

• 🔋 Low Power Consumption: Ideal for battery-powered systems

• 🔧 Dimensions: Compact form factor with mounting holes

• 📎 Easy Integration: Breadboard and jumper wire friendly

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🧰 Applications:

• Automatic lighting systems

• Motion-activated alarms and buzzers

• Human presence detectors

• Smart home automation

• Security and surveillance systems

• Energy-saving projects

• Motion-triggered data logging or camera modules

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🔗 Why Choose the HC-SR501?

Reliable, affordable, and easy to set up — the HC-SR501 is one of the most popular motion sensors in the DIY electronics community. With its adjustable settings, wide detection range, and simple digital interface, it’s perfect for both beginners and professionals working on interactive or autonomous systems.

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📦 Package Includes:

• 1 x HC-SR501 PIR Motion Sensor Module

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🔍 Keywords:

HC-SR501 PIR sensor, motion detector module, infrared motion sensor Arduino, PIR sensor for ESP32, motion sensor for home automation, HC-SR501 Pakistan, DIY PIR motion alarm, smart motion detection sensor, passive infrared human sensor.