SR501 PIR Sensor
The SR501 PIR Sensor is a passive infrared motion detector designed for reliable motion sensing in various applications. It utilizes a pyroelectric sensor and Fresnel lens to detect infrared radiation changes caused by moving objects. The module features adjustable sensitivity and delay time, allowing customization for different environments. Its compact design and low power consumption make it suitable for battery-powered devices and embedded systems.
Features
- Passive infrared motion detection.
- Adjustable sensitivity and delay time.
- Dual trigger modes: repeatable and non-repeatable.
- Wide operating voltage range.
- Low quiescent current for energy efficiency.
- Compact size with mounting holes for easy installation.
Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 4.5–20VDC |
| Quiescent Current | <50µA |
| Output Level | High: 3.3V / Low: 0V |
| Delay Time | 0.3s–200s (adjustable) |
| Block Time | 2.5s (default) |
| Detection Angle | <120° |
| Detection Range | Up to 7meters |
| Operating Temperature | -15°C to +70°C |
| Dimensions | 32mm x 24mm |
| Lens Diameter | 23mm |
PINOUT
| Pin | Description |
|---|---|
| VCC | Connect to 4.5V to 20V. |
| OUTPUT | Digital sensor output (active HIGH) – Normally connects to a digital input pin on a microcontroller. |
| GND | Connect to system ground. This ground needs to be in common with the microcontroller. |
Applications
- Automated lighting control.
- Security and intrusion detection systems.
- Energy-saving devices.
- Home automation projects.
- Robotics and motion tracking.
Package Contents
- 1x SR501 PIR Sensor.