Precision Non-Contact Detection for Your Electronics Projects

When mechanical switches fall short, optical sensing steps in. The KY-010 Photo Interrupter Module is engineered to provide friction-free, instantaneous object detection. By utilizing a continuous beam of light, this sensor eliminates the physical wear and tear associated with traditional push buttons or microswitches, ensuring your automated systems run smoothly and reliably over time.

How the KY-010 Optical Sensor Works

At the core of this module is a high-output GaAs infrared light-emitting diode (LED) positioned directly across from a highly sensitive photo-receiving component. They are housed in a specialized U-shaped bracket. When an object passes through the gap and breaks the infrared beam, the receiver instantly detects the shading effect and triggers a change in the logic state. This provides a crisp, clean digital signal to your microcontroller, letting your code know exactly when an interruption occurred.

Perfect for Robotics and Automation

This sensor is a staple for DIY hardware enthusiasts and STEM educators. It is widely used to create custom optical encoders—simply attach a slotted wheel to a motor shaft, and the KY-010 will count the interruptions to calculate RPM or distance traveled. It also serves as an exceptionally accurate limit switch for CNC machines, robotic arms, and automated counting assembly lines.

Plug-and-Play Simplicity

We know that in DIY electronics, ease of use is everything. The KY-010 features a straightforward 3-pin interface and operates on a standard DC 5V logic level, making it natively compatible with popular development boards like Arduino. With its ultra-compact footprint and a pre-drilled 3mm positioning hole, mounting this sensor into your custom 3D-printed enclosures or tight chassis spaces is completely hassle-free.