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Pricelist: Retail Price (B2C) Pricelist
Pricelist: Retail Price (B2C) Pricelist
KY-010 Photo Interrupter Light Blocking Sensor for Arduino

KY-010 Photo Interrupter Light Blocking Sensor for Arduino

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SpecificationDetails
Operating Voltage3.3V to 5V DC
Slot Width5mm
Output TypeDigital (High/Low)
Emitter940nm IR LED
DetectorPhototransistor
Dimensions18.5mm x 15mm
Response TimeMicroseconds (High-speed capable)
Price
₹ 55.08 ₹ 55.08
(Tax included)

Product Description

The KY-010 Module is designed for high-speed switching and reliability. Unlike mechanical switches, it has no moving parts, meaning it doesn't suffer from "contact bounce" or physical wear over time. The module features a standard 3-pin interface and is compatible with all major microcontrollers. When the gap is clear, the phototransistor receives the IR light and stays in one logic state; when blocked, it flips to the opposite state. This simple binary output is ideal for interrupt-driven code in robotics.

Key Features

  • Non-Contact Sensing: Eliminates mechanical wear, providing a much longer service life than traditional limit switches.

  • High-Speed Detection: Capable of responding to fast-moving objects, making it suitable for motor RPM sensing.

  • Compact "U" Design: The 5mm slot is perfectly sized for standard encoder disks and thin structural components.

  • Breadboard Friendly: Features a 2.54mm pitch header for easy prototyping with jumper wires.

  • Low Power Consumption: Minimal current draw makes it suitable for battery-powered projects.

Technical Details

  • Logic Level: Compatible with 3.3V (ESP32/Raspberry Pi) and 5V (Arduino).

  • Mounting: Includes a small hole for secure attachment to a motor bracket or chassis.

Prototyping and Engineering Tips from Robogears

  • Tachometer Setup: To measure motor speed, mount a slotted encoder disk on the motor shaft. As the disk spins, the "teeth" will block the light beam, creating a series of pulses. By counting these pulses over time in your code, you can calculate the exact RPM.

  • Pull-up Resistor: While most KY-010 modules have a built-in resistor, some versions require you to enable the internal pull-up resistor on your microcontroller pin (pinMode(pin, INPUT_PULLUP)) for a stable signal.

  • Ambient Light Interference: Although the IR detector is tuned to a specific wavelength, very bright direct sunlight can occasionally "leak" into the sensor and cause false triggers. For outdoor robots, add a small 3D-printed shroud or piece of black tape to shade the sensor slot.

  • The "Clearance" Rule: Ensure your encoder disk or moving part is centered in the 5mm slot. If the part rubs against the plastic housing of the sensor, it will create friction and eventually damage both the disk and the sensor.

Package Includes

  • 1 x KY-010 Broken Light Blocking Sensor Module

Disclaimer

This sensor requires an opaque object to block the beam. Transparent or semi-transparent plastics may not trigger the sensor reliably. Ensure the IR emitter and receiver are kept free of dust for consistent performance.