Digital Display Control Module for HC-SR04 Ultrasonic Sensor

Digital Display Control Module for HC-SR04 Ultrasonic Sensor

Product Description

The Digital Display Control Module is a compact driver and testing board designed to work with the HC-SR04 Ultrasonic Sensor. Powered by an integrated STM8S103 8-bit microcontroller, it processes distance measurements and displays the results without requiring an external Arduino or additional programming.

The module supports both digital display and serial communication modes, making it useful for sensor testing, robotics debugging, distance measurement, and PC-based data logging.

Dual Output Modes

Digital Tube Display Mode

Connect an HC-SR04 sensor and provide 5V DC power through the 2.54mm socket to display the measured distance directly on the onboard 3-digit LED display in centimeters.

Serial Port Mode

The module can send distance readings through its TX and RX pins to a USB-to-TTL converter. This allows distance data to be viewed or logged on a computer.

The serial interface operates at 9600 bps with the output format:

D: XXX

where XXX represents the measured distance in centimeters.

Key Features

• Designed for HC-SR04 ultrasonic sensor
• Integrated STM8S103 8-bit microcontroller
• Onboard 3-digit LED distance display
• Supports serial TX/RX output
• 9600 bps serial communication
• Plug-and-play sensor testing
• No external Arduino required
• 3cm–400cm measurement range
• Compact and lightweight design
• 2.54mm power interface

Technical Specifications

Feature	Specification
Main Control Chip	STM8S103 8-bit MCU
Input Voltage	5V DC
Measurement Range	3cm – 400cm
Display	3-Digit LED Tube
Data Interface	TTL Serial Port
Baud Rate	9600 bps
Serial Output	D: XXX
Power Interface	2.54mm White Socket / Headers
Dimensions	25mm × 35mm
Weight	7g
Compatible Sensor	HC-SR04

Working Principle

The HC-SR04 ultrasonic sensor measures the distance to an object and provides the corresponding signal to the control module. The onboard STM8S103 MCU processes this information and converts it into a distance value.

The measured distance can then be displayed directly on the onboard LED display or transmitted through the serial interface for viewing and data logging on a computer.

Typical Applications

HC-SR04 Testing

Useful for quickly checking the operation and distance measurement performance of an HC-SR04 sensor without writing additional code.

Robotics Debugging

Can be used to verify ultrasonic distance measurements during robot development and troubleshooting.

Distance Measurement

Suitable for building simple standalone or portable distance measurement tools.

PC Data Logging

The serial interface allows distance readings to be transferred to a computer through a USB-to-TTL converter.

Applications

• HC-SR04 sensor testing
• Ultrasonic distance measurement
• Robotics debugging
• Distance verification
• PC-based data logging
• Educational projects
• DIY measurement tools
• Sensor development
• Embedded electronics projects

Package Includes

• 1 × Digital Display Control Module for HC-SR04

Note: HC-SR04 ultrasonic sensor is not included.

Important Note

HC-SR04 Required

This module requires a separate HC-SR04 Ultrasonic Sensor, which is sold separately.

Serial Port Wiring

When using serial communication with a USB-to-TTL converter:

• Module TX → Converter RX
• Module RX → Converter TX
• VCC → 5V
• GND → GND

Power Supply

The 2.54mm white socket is intended for 5V DC power input only. Do not apply a higher voltage, as this may damage the onboard STM8S103 microcontroller and other components.

Product Disclaimer

Product information may vary slightly between manufacturing batches. Product images are for illustrative purposes only and may differ from the actual product in appearance, component placement, or markings.

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