Gravity: Infrared Light Photo Interrupter Module (Wavelength 940nm)

Gravity: Photo Interrupter Module integrates an ITR9608 slotted photoelectric switch to deliver reliable optical interruption detection for embedded electronics and automation projects. A compact gravity-series sensor board combines an infrared emitter and receiver within a 5.0 mm slot, generating a digital signal whenever an object blocks the light path. This optical detection module enables accurate position sensing, rotation counting, and motion triggering in robotics and interactive devices. Seamless compatibility with controllers such as Arduino and micro:bit simplifies integration into rapid prototyping environments, educational builds, and automated counting systems.

Reliable Slotted Photoelectric Detection

An integrated ITR9608 infrared photoelectric switch forms the core of this optical interruption sensor. A transmitter and receiver positioned face‑to‑face create a narrow light path inside the slot. When a mechanical flag, encoder disk, or moving object passes through the gap, the light beam becomes blocked and the module outputs a digital trigger signal. This precise light‑blocking mechanism enables dependable edge detection for rotation measurement, object counting, and position monitoring in embedded control systems.

5.0 mm Wide Detection Gap

A 5.0 mm photonic gap provides flexible mechanical tolerance for many sensing tasks. Wider spacing allows encoder wheels, thin plates, or moving components to pass through the slot without precise alignment requirements. This structural advantage makes the photo interrupter board suitable for speed measurement assemblies, paper detection mechanisms, or simple limit‑position sensing in robotics mechanisms and small automation equipment.

Gravity Interface for Rapid Integration

A standard Gravity 3‑pin interface simplifies wiring and ensures stable electrical connections with popular development platforms. Direct compatibility with controllers used in maker ecosystems allows quick integration into robotics prototypes, STEM learning projects, and sensor experimentation setups. Plug‑and‑play connectivity reduces circuit complexity while enabling fast signal acquisition for microcontroller‑based control systems.

Versatile Detection for Automation and Robotics

This compact optical slot sensor supports diverse detection tasks including rotation monitoring, object counting, and presence detection. Digital signal output allows direct connection to microcontroller interrupt pins for high‑speed measurement or event triggering. Applications range from encoder feedback and printer paper detection to card insertion switches and conveyor counters, making the module a practical sensing component for both educational and industrial prototyping.

This photoelectric detection module fits a wide range of projects requiring precise object interruption sensing. Typical uses include encoder‑based speed measurement, smart card slot detection, paper path monitoring, and automated production counters. The gravity‑series optical sensor board also serves as a practical teaching tool in STEM Education, helping demonstrate infrared sensing principles, digital signal triggering, and real‑time motion detection in embedded systems.

Figure: Wiring Diagram of Gravity: Photo Interrupter Module and micro:bit

Figure: Wiring Diagram of Gravity: Photo Interrupter Module and Arduino UNO