Display for HC-SR04 Ultrasonic Distance Measurement Control Board Rangefinder With Serial Data Output

HC‑SR04 Ultrasonic Distance Measurement Control Module (with 3‑digit Display)

Description:

Plug‑and‑play display board for HC‑SR04 (and compatible modules like US-100, HY-SRF05). Features a built-in microcontroller and 3‑digit LED display showing measured distance in centimeters, updating about once per second. Also provides serial output of readings.

Key Features:

• Plug-in socket for HC‑SR04 sensor
• Direct Compatible with HC‑SR04
• Compatible with US‑100 and HY‑SRF05 modules (with minor configuration)
• Built-in microcontroller automates distance measurement
• 3‑digit LED displays range in centimeters
• Serial output (baud 9600, format D:XXX) every second
• Operates on 5 V DC power

Specifications:

• Input Voltage: 5 V DC
• Measurement Range: 3 cm to 400 cm (1″–13 ft) (values beyond may read “000”)
• Accuracy: Typically within 1% (depends on sensor)
• Serial Output: 9600 baud; output format D:XXX (cm)
• Board Dimensions: approx. 36 × 25 × 12 mm
• Current Draw: Typical consumption ~20 mA

Usage Notes:

• Mount HC‑SR04 into the female header oriented away from display
• Supply 5 V and GND via the 6-pin header or JST connector as marked
• Readings appear on LED display and serial TX pin every ~1 second
• Clean flat reflective surfaces provide consistent detection; avoid directing sensor at small or angled objects
• In some cases, external LED modules may impact maximum measurable distance due to power or timing interference