HC-SR501 Pyroelectric Infrared (PIR) Motion Sensor Module

The HC-SR501 PIR Motion Sensor Module is a compact, reliable, and easy-to-use infrared detection module designed for Arduino, STM32, Raspberry Pi, and a wide range of DIY electronics projects. Whether you're building a smart security system, an automatic lighting circuit, or an interactive device, this module delivers consistent motion detection performance right out of the box.

Key Features

Pyroelectric Infrared (PIR) Technology: Detects movement by sensing changes in infrared radiation emitted by warm bodies within its field of view.
Adjustable Sensitivity & Time Delay: Onboard potentiometers allow you to fine-tune the detection range and output hold time to suit your specific application.
Wide Compatibility: Works seamlessly with Arduino, STM32, Raspberry Pi, and other microcontroller platforms.
Compact Module Design: Small form factor makes it easy to integrate into enclosures, breadboards, or custom PCBs.
Low Power Consumption: Ideal for battery-powered and energy-conscious DIY builds.
Dual Trigger Modes: Supports both single-trigger and repeatable-trigger modes via an onboard jumper.
Digital Output: Outputs a HIGH signal upon motion detection — simple to interface with any microcontroller digital input pin.

Specifications

Model: HC-SR501
Sensor Type: Pyroelectric Infrared (PIR)
Compatible Platforms: Arduino, STM32, Raspberry Pi, and more
Output Type: Digital (HIGH/LOW)
Package: Electronic Module
Condition: New
Customizable: Yes (sensitivity & delay adjustable via potentiometers)

What Can You Build With It?

The HC-SR501 is a favorite among makers, hobbyists, students, and engineers. Here are just a few popular project ideas:

DIY home security and motion alert systems
Automatic lights and energy-saving switches
Smart doorbell and entryway notification systems
Interactive displays and museum exhibits
Robotics and proximity-triggered automation

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Frequently Asked Questions

Q: What is the HC-SR501 PIR Motion Sensor Module used for?

A: The HC-SR501 is a pyroelectric infrared (PIR) sensor module used to detect motion in DIY electronics projects. It is widely used in Arduino and STM32 builds for applications such as automatic lighting, motion-triggered alerts, smart switches, robotics, and interactive devices. It outputs a simple HIGH/LOW digital signal, making it beginner-friendly and easy to integrate.

Q: Is the HC-SR501 compatible with Arduino and Raspberry Pi?

A: Yes! The HC-SR501 PIR sensor module is compatible with Arduino, STM32, Raspberry Pi, and virtually any microcontroller platform that accepts a digital input signal. It operates on a standard supply voltage and integrates easily into breadboard or PCB-based projects.

Q: Can I adjust the sensitivity and detection range of the HC-SR501?

A: Absolutely. The HC-SR501 module features two onboard potentiometers that allow you to independently adjust the detection sensitivity (range) and the output time delay. This makes it highly versatile for different environments — from small rooms to larger open spaces — without any additional components.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.