Digital Display for HC-SR04 Ultrasonic Distance Measurement Control Board

Digital Display for HC-SR04 Ultrasonic Distance Measurement Control Board is an integrated module that significantly simplifies distance measurement by pairing an HC-SR04 ultrasonic sensor with a dedicated control and display circuit. This complete solution eliminates the need for an external microcontroller, therefore, reducing both complexity and coding overhead in simple range-finding projects. The board contains all necessary driving circuitry and calculation logic, directly converting the ultrasonic echo time into a distance reading displayed on a bright LED segment display. Consequently, this module enables rapid prototyping and standalone distance monitoring for hobbyists and professionals who require a quick, accurate visual indication of range. You can implement the Digital Display for HC-SR04 in any application where a rapid, self-contained distance measurement system is necessary.

Key Features:

• Integrated Solution: Combines the HC-SR04 sensor, measurement control logic, and a display driver onto a single, compact PCB.
• No Microcontroller Needed: The built-in circuitry handles the trigger, echo timing, and calculation, offering plug-and-play functionality.
• Clear Digital Readout: Features a bright LED segment display (typically three or four digits) that shows the distance directly in centimeters or inches.
• High Accuracy: Delivers measurement accuracy comparable to standard HC-SR04 implementations, generally within ±0.5 cm to ±1 cm.
• Adjustable Range Setting: Often includes configuration jumpers or pads to set the measurement unit (cm/inch) or update frequency.

Technical Specifications:

• Input Voltage (V_CC): 5 V DC (Standard TTL/Logic voltage)
• Current Consumption: ≈ 30 mA (Idle) to ≈ 50 mA (Active measurement with display on)
• Distance Measurement Range: Typically 2 cm to 400 cm (≈ 0.8 in to 13 ft)
• Display Type: 3 or 4-Digit Red LED Segment Display
• Measurement Accuracy: ±1 cm
• Measurement Frequency: User-configurable or typically ≈ 15 Hz (15 measurements per second)

Mechanical Specifications:

• Component Integration: Dedicated PCB housing the measurement IC, display driver, and socket for the HC-SR04 sensor.
• Sensor Compatibility: Designed specifically for use with the standard 4-pin HC-SR04 ultrasonic module.
• Mounting: Includes standard mounting holes for easy installation into enclosures or chassis.

Dimensions:

• Control Board Size: ≈ 40 mm x 28 mm (Varies by manufacturer)
• Sensor Size (HC-SR04): ≈ 45 mm x 20 mm (If included)
• Pin Header Pitch: 2.54 mm
• Display Digit Height: ≈ 0.36 inch

Pinout and Wiring:

• VCC: Connect to the 5V DC power source. This supplies power to both the control board and the ultrasonic sensor.
• GND: Connect to the circuit ground reference (0V).
• Sensor Socket: The control board provides a direct 4-pin socket (VCC, Trig, Echo, GND) where the HC-SR04 sensor plugs in directly.
• Output Pin (Optional): Some models include a digital or serial output pin, furthermore, allowing the user to transmit the measured data to an external device if necessary.
• Wiring Note: Ensure a stable 5V supply to prevent measurement drift, as noise on the power rail can affect the delicate timing of the ultrasonic measurement.

Datasheet Reference:

• Download Digital Display Control Board User Manual / Datasheet

Commonly Used in:

• Prototyping and Testing: Offering a fast, visual way to verify distance readings without needing to write microcontroller code and serial print output.
• Educational Projects: Perfect for introducing concepts of sound ranging and time-of-flight to students in a hands-on manner.
• Non-contact Measurement Tools: Integrated directly into simple handheld tools or fixed-position level sensors.

Applications:

• Parking Assistance Systems: Providing a visual distance countdown for vehicles or indoor robotic systems.
• Liquid Level Sensing: Monitoring the level of water or other liquids in containers (requires calibration).
• Security and Alarms: Triggering alarms or lights when an object enters a specified range.
• Robotics: Essential for obstacle avoidance in mobile robots and automated platforms.

Equivalent Models:

• JSN-SR04T-2.0: Although it is a ruggedized ultrasonic sensor, not a display, it often serves the same function in non-visual distance systems.
• Integrated Laser Distance Modules: However, these offer much higher accuracy and different range limits, serving as a distinct alternative to ultrasonic measurement.
• DIY Arduino+LCD Shield: A project-based alternative where a standard HC-SR04 is connected to a coded Arduino and an LCD/OLED shield.

Package Includes:

• 1 x Digital Display for HC-SR04 Ultrasonic Distance Measurement Control Board