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SKU:HCSR501-PIR
HC-SR501 PIR Motion Sensor Detector Module — Adjustable Range
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Rs.160.00
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Rs.160.00
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HC-SR501 PIR Motion Sensor Detector Module
The HC-SR501 is the most widely used passive infrared (PIR) motion sensor in Arduino and embedded projects. It detects movement by sensing changes in infrared radiation emitted by warm bodies — humans, animals, or any heat source. With adjustable sensitivity and time-delay potentiometers, it's perfect for security alarms, automatic lighting, and smart home automation projects.
Technical Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 5V – 20V DC |
| Output Voltage | 3.3V (HIGH) / 0V (LOW) |
| Detection Range | 3m – 7m (adjustable) |
| Detection Angle | ~110° cone |
| Delay Time | 5s – 300s (adjustable) |
| Trigger Mode | Single / Repeatable (jumper selectable) |
| Blocking Time | 2.5s (default) |
| Operating Temperature | -20°C to +80°C |
| Dimensions | 32mm × 24mm |
Pinout
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | 5V – 20V Supply |
| 2 | OUT | Digital Output (3.3V HIGH on motion) |
| 3 | GND | Ground |
Onboard Adjustments
- Sensitivity potentiometer — adjusts detection range (3m to 7m)
- Time-delay potentiometer — adjusts output HIGH duration (5s to 300s)
- Trigger mode jumper — Single trigger (H) or Repeatable trigger (L)
Key Features
- Passive IR detection — no emitter needed, ultra-low power
- Wide supply voltage: 5V to 20V — works with 5V and 12V systems
- Adjustable range and delay via onboard potentiometers
- 3.3V logic output — directly compatible with ESP32, STM32, Arduino
- Fresnel lens dome for wide 110° detection angle
Applications
- Security alarm and intruder detection systems
- Automatic lighting control
- Smart home motion-triggered automation
- People counting and occupancy detection
- Energy-saving systems (auto power-off)