HCSR501 PIR Motion Sensor (Passive Infrared Sensor)

The HC-SR501 PIR Motion Sensor is one of the most popular motion detection modules used in electronics, IoT, home automation, and security projects. It utilizes Passive Infrared (PIR) technology to detect movement from humans and animals by sensing changes in infrared radiation emitted by warm objects.

The sensor provides a digital output signal whenever motion is detected, making it easy to interface with Arduino, ESP32, ESP8266, Raspberry Pi, and other development platforms. With adjustable sensitivity and trigger delay settings, the HC-SR501 offers excellent flexibility for both beginner and professional electronics projects.

Key Features
Detects human and animal movement using infrared radiation
Low power consumption design
Adjustable detection sensitivity
Adjustable output delay time
Wide detection range
Reliable and stable performance
Easy integration with microcontrollers
Compact and lightweight design
Suitable for indoor automation projects
Supports repeatable and non-repeatable trigger modes
Technical Specifications
Model: HC-SR501
Operating Voltage: 4.5V – 20V DC
Operating Current: Less than 50µA
Output Voltage: 3.3V Logic Level
Detection Distance: Up to 7 meters (adjustable)
Detection Angle: Up to 120°
Trigger Modes: Repeatable (H) / Non-Repeatable (L)
Delay Time: Adjustable from approximately 3 seconds to 5 minutes
Warm-Up Time: 30 to 60 seconds
Operating Temperature: -15°C to +70°C
Applications
Smart Home Automation

Automatically control lights, fans, and appliances when motion is detected.

Security Systems

Detect intruders and trigger alarms, cameras, or notifications.

Automatic Lighting

Turn lights on when a person enters a room and off when no motion is detected.

IoT Projects

Integrate motion detection into ESP32, ESP8266, and cloud-based automation systems.

Robotics

Enable robots to detect nearby human movement.

Energy Saving Systems

Reduce electricity consumption by activating devices only when occupancy is detected.

Pin Configuration
VCC – Power Supply (4.5V to 20V)
OUT – Digital Output Signal
GND – Ground
Package Includes
1 × HC-SR501 PIR Motion Sensor Module
Why Choose HC-SR501 PIR Motion Sensor?

The HC-SR501 offers excellent performance, high sensitivity, low power consumption, and simple integration, making it one of the best choices for motion detection applications. Whether you are building a smart home system, security solution, IoT project, or automation prototype, this sensor provides reliable motion sensing at an affordable price.

Order now and add intelligent motion detection capabilities to your next electronics project.