HC-SR501 PIR Motion Sensor Module Infrared Detector

The HC-SR501 PIR Motion Sensor is a reliable and easy-to-use passive infrared sensor that detects human movement within a cone of up to 120° and a range of up to 7 meters. Operating from 5V to 20V DC, this low-power sensor consumes less than 65µA in standby mode, making it suitable for battery-powered projects. It outputs a high 3.3V signal when motion is detected and returns to low when the area is clear, with adjustable delay time from 0.3 to 200 seconds.

This sensor supports two trigger modes: non-repeatable (L) and repeatable (H, default). The module features an induction blackout time (default 0.2s) to prevent false triggers, and optional light control allows the sensor to operate only in low-light conditions when a photoresistor is installed.

Key Features

• Operating voltage: DC 5–20V
• Low quiescent current: <65µA
• High-level output: 3.3V, low-level: 0V
• Adjustable delay time: 0.3–200s
• Induction blackout time: 0.2s (default)
• Detection angle: <120° cone
• Detection range: up to 7 meters
• Two trigger modes: non-repeatable (L) or repeatable (H, default)
• PCB dimensions: 32mm x 24mm, screw hole spacing 28mm
• Optional light control for day/night operation

Applications

• Motion-activated lighting systems
• Home automation and security projects
• Battery-powered motion detection devices
• ESP32 or Arduino motion detection projects

Getting Started

Learn how to use the HC-SR501 with an ESP32 in our detailed guide: ESP32 Detecting Motion with HC-SR501 PIR Sensor.

The HC-SR501 PIR Motion Sensor provides accurate, low-power motion detection for a wide range of DIY and professional electronics applications, with flexible trigger options and adjustable delay for precise control.

This product can be found here:

• Infrared (IR)
• LEDs
• Sensors