The YL-105 is an IR tracking and obstacle avoidance sensor. It combines an infrared emitter and a phototransistor receiver on a small PCB with onboard comparator circuitry.
Includes a red power LED and a green digital output status LED. Pinout Configuration yl-105 datasheet
Typically includes two infrared remotes for arming/disarming The YL-105 is an IR tracking and obstacle avoidance sensor
📐 : Roughly 26mm x 19mm , making it ideal for breadboards or small enclosures. 🛡️ Version 2: YL-105 Infrared Motion Sensor Alarm yl-105 datasheet
For probe-style variants, the effective sensing depth is approximately Sensitivity: