{"product_id":"hc-020k-photoelectric-speed-sensor-module-with-encoder-disc-arduino-compatible","title":"HC-020K Photoelectric Speed Sensor Module with Encoder Disc – Arduino Compatible","description":"\u003cp\u003e\u003cspan\u003eThe HC-020K Photoelectric Speed Sensor Module is a compact and reliable sensor designed to measure rotational speed, wheel movement, and motor RPM in robotics and DIY electronics projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUsing an infrared photoelectric detection system, the module detects interruptions in an infrared beam as a slotted encoder disc rotates through the sensor. These interruptions generate digital pulses that can be processed by a microcontroller to calculate rotational speed, wheel speed, and movement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdeal for Arduino-based robotics, smart vehicles, motor control systems, and educational electronics projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e HC-020K\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSensor Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Infrared Photoelectric Speed Sensor\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOperating Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Typically 3.3V–5V DC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOutput Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Digital Pulse Signal\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDetection Method:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Infrared Beam Interruption\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMeasurement Capability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Rotational Speed, Motor RPM, and Wheel Speed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eEncoder Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Slotted Encoder Discs\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMicrocontroller Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Arduino, ESP32, Raspberry Pi, and other development boards\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompact Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Easy integration into robotic vehicles and motor assemblies\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNon-Contact Detection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures rotation without physical contact with the moving disc\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRobot wheel speed measurement\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSmart car and robotic vehicle projects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDC motor RPM monitoring\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWheel rotation detection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDistance and movement estimation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMotor speed feedback systems\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRobotics and automation projects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSTEM education and electronics experiments\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eHow It Works\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe HC-020K uses an infrared transmitter and receiver positioned on opposite sides of a slot.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen a slotted encoder disc rotates through the sensor, the infrared beam is repeatedly blocked and unblocked, generating electrical pulses.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA connected microcontroller counts these pulses to determine rotational speed.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRPM Calculation:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRPM = (Pulse Frequency × 60) ÷ Number of Slots\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor example, using a 20-slot encoder disc, a measured pulse frequency of 100 Hz corresponds to 300 RPM.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003ePackage Includes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × HC-020K Photoelectric Speed Sensor Module\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Slotted Encoder Disc (if included with the selected kit)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNote:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The number of slots on the encoder disc determines the measurement resolution. Verify the included accessories, operating voltage, and pin configuration before installation. A microcontroller is required to process the sensor signals.\u003c\/span\u003e\u003c\/p\u003e","brand":"NamTronics","offers":[{"title":"Default Title","offer_id":68076971982959,"sku":"10098","price":40.0,"currency_code":"NAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/9866\/5839\/files\/e5f513db-de3e-4c84-b8fc-5a5a433ef0be.png?v=1793366395","url":"https:\/\/namtronics.com\/products\/hc-020k-photoelectric-speed-sensor-module-with-encoder-disc-arduino-compatible","provider":"NamTronics","version":"1.0","type":"link"}