HCSR501 PIR Motion Sensor Module Maximize automation and energy efficiency with the HCSR501 PIR Motion Sensor, designed for reliable human motion detection in a wide range of projects. This versatile sensor offers adjustable settings to meet different needs and environments, making it ideal for home automation, security, and energysaving applications. Key Features and Benefits: Two Trigger Modes for Flexible Operation Choose between nonrepetitive or repetitive triggering simply by setting the onboard jumper. * Nonrepetitive mode: The output switches from to low automatically after the set delay period ends, even if motion is still detected. * Repetitive mode: The output remains as long as motion is detected within the sensing range during the delay period, switching to low only once movement ceases. Adjustable Sensing Distance Finetune detection range with a builtin potentiometer. * Clockwise rotation increases the range up to approximately 7 meters. * Counterclockwise rotation reduces range down to approximately 3 meters. Adjustable Delay Time Set how long the output remains active after motion is detected. * Clockwise rotation increases delay up to about 300 seconds. * Counterclockwise rotation reduces delay to about 0.5 seconds. HCSR501 supports a delay time range from 0.5 seconds to approximately 200 seconds using the delay potentiometer. Wide Operating Voltage Range Compatible with DC power supplies from 4.5V to 20V, giving flexibility for integration into different systems. Low Quiescent Current Consumes less than 50uA in standby mode, promoting energy efficiency for batterypowered devices. Trigger Configuration L position: Nonrepetitive trigger mode. H position: Repetitive trigger mode (default setting). Performance Specifications: Model: HCSR501 Sensing Distance: Adjustable 3 to 7 meters Delay Time Range: 0.5 to 200 seconds adjustable, maximum up to 300 seconds Operating Voltage: DC 4.5V to 20V Standby Current: <50uA Trigger Mode: Selectable by jumper (L or H) Practical Applications: 1. Home or office lighting automation: Lights turn on when a person enters and off when no movement is detected, helping reduce energy consumption. 2. Security systems: Trigger alarms or cameras upon detecting human motion, enhancing safety without constant manual monitoring. 3. Energysaving devices: Control fans, heaters, or other electronics to operate only when someone is present in the area. The HCSR501 PIR Motion Sensor offers dependable motion detection, adjustable performance settings, and easy integration into various electronic or automation projects. It is suitable for both DIY hobbyists and professional installations, ensuring precise control over how and when connected devices respond to movement.