HC-020K Optical Encoder Speed Sensor Module

Measure motor speed, rotation, and position accurately with the HC-020K Optical Encoder Module. This compact infrared-based speed sensor generates digital pulse signals as a slotted encoder wheel rotates through its optical slot, making it ideal for robotics, motor control, STEM projects, automation systems, and DIY electronics.

The HC-020K is widely used with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers for RPM measurement, wheel odometry, speed feedback, and closed-loop motor control applications.

Key Features

• High-precision optical speed sensing
• Infrared slot-type encoder technology
• Digital pulse output for easy microcontroller interfacing
• Compatible with Arduino, ESP32, STM32, PIC, and Raspberry Pi
• Ideal for robotics, automation, and educational projects
• Fast response with stable pulse detection
• Compact design with mounting holes for easy installation

Technical Specifications

• Model: HC-020K
• Operating Voltage: 3.3V 5V DC
• Output Type: Digital Pulse Signal (TTL)
• Detection Method: Infrared Optical Interrupt
• Encoder Resolution: 20 Slots/Lines
• Maximum Measurement Frequency: 100 kHz
• Slot Width: Approximately 5 mm
• Disc Diameter: 24 mm
• Disc Inner Diameter: 4 mm
• Operating Temperature: -40C to +85C
• Interface: VCC, GND, OUT

Applications

• Motor RPM measurement
• Robot wheel encoders
• Speed feedback systems
• Position and motion tracking
• DIY robotics projects
• STEM and educational experiments
• Industrial automation prototypes