The HC-SR501 PIR Sensor and IR Proximity Sensor Combo is a versatile sensing solution designed for motion detection and obstacle sensing in electronics and IoT projects. This combo pairs a PIR motion sensor for detecting human presence with an IR proximity sensor for short-range object detection. Easy to use and compatible with popular development boards, this set is ideal for beginners, robotics applications, automation systems, and smart security projects. Features: HC-SR501 PIR sensor for reliable human motion detection IR proximity sensor for short-range obstacle and object detection Adjustable sensitivity and delay time on PIR sensor module IR sensor includes onboard LED indicator and distance adjustment knob Digital output from both sensors for easy interfacing Compatible with Arduino, Raspberry Pi, NodeMCU, PIC, 8051, and similar boards Specifications: PIR Sensor Model: HC-SR501 PIR Operating Voltage: 4.520 V DC PIR Current Consumption: 0.06 mA (approx.) PIR Detection Range: 37 m PIR Adjustments: Sensitivity, delay time, repeat trigger selection IR Proximity Sensor Chip: LM393 IR Operating Voltage: 3.35 V DC IR Detection Range: 230 cm IR Features: Distance adjustment potentiometer, onboard indicator LED Package Includes: 1 HC-SR501 PIR Motion Sensor Module1 IR Proximity Sensor Module