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HC-SR501 PIR Motion Sensor Module detects infrared heat signatures from moving bodies. Inside the 7-meter range, the pyroelectric sensor triggers a 3.3V TTL signal for microcontrollers. A 120-degree induction angle covers typical entry points for security automation.
Key Features
- Adjustable Detection Distance: 3-7m range tuned via onboard potentiometer. Matches sensor reach to specific room dimensions.
- Variable Delay Time: 0.3s to 300s output hold duration. Prevents rapid light flickering during brief movement.
- BISS0001 IC Control: Dual trigger modes via hardware jumpers. Manages signal consistency during continuous human motion.
- Low Energy Consumption: Static current draw under 50 µA. Extends runtime for remote battery-powered setups.
- Wide Voltage Input: Operates between 4.5V and 20V DC. Connects directly to most standard power sources.
- Thermal Resilience: Rated for -15 to +70°C environments. Functions during high humidity and road dust exposure.
Frequently Asked Questions
How to adjust HC-SR501 sensitivity?
Turn the onboard potentiometer clockwise to increase detection distance up to 7 meters. This hardware modification alters the gain of the pyroelectric sensor.
What is the range of HC-SR501 sensor?
Detection spans 3 to 7 meters with a 120-degree angle. Performance remains stable even in high humidity environments.
