HC-SR04 Ultrasonic Sensor by HiLetgo 2pcs with STM8S103 5V

Description

Product Overview

The HiLetgo HC-SR04 ultrasonic sensor is engineered for high‑precision distance detection across a broad range of 3 cm to 400 cm, making it a versatile component for a variety of electronic projects. Housed in a compact 24.2 mm × 35.1 mm (0.95 in × 1.38 in) enclosure, the module weighs just 0.53 oz, allowing easy integration into tight spaces without compromising structural integrity. The device operates on a standard 5 V supply, ensuring compatibility with most development boards, including Arduino, Raspberry Pi, and STM32 platforms.

At the heart of the sensor lies an onboard STM8S103 microprocessor, a high‑performance 8‑bit MCU that handles echo timing calculations internally, delivering fast and reliable readings without burdening the host controller. A built‑in digital tube display provides immediate visual feedback of measured distances, eliminating the need for additional debugging tools during prototyping. The sensor’s ultrasonic transducer emits sound waves at 40 kHz, which bounce off objects and return to the receiver, where the time‑of‑flight is converted into a distance value.

Durability is a key focus of the design; the sensor’s PCB is coated with a protective epoxy layer that resists moisture and dust ingress, extending its service life in industrial environments. The module’s pins are gold‑plated for enhanced conductivity and corrosion resistance, ensuring stable connections even after prolonged use. All components meet CE and RoHS standards, reflecting HiLetgo’s commitment to safety and environmental responsibility.

Usage

Designed for both hobbyists and professional engineers, the HC‑SR04 excels in applications such as autonomous navigation, obstacle avoidance, and level sensing. In robotics, the sensor can be mounted on a mobile platform to detect walls, stairs, or moving objects, enabling real‑time path planning and collision avoidance. Drone developers benefit from its lightweight profile, using it to maintain safe altitude and avoid mid‑air obstacles during flight tests.

Industrial users often employ the sensor for material handling systems, where it monitors the presence and distance of items on conveyor belts, triggering actuators or alarms as needed. The 5 V operating voltage aligns with common PLC and microcontroller power supplies, simplifying wiring and reducing the need for additional voltage regulators. Its robust construction also makes it suitable for outdoor installations, such as parking assistance systems or agricultural monitoring, where exposure to dust and temperature fluctuations is common.

Educational institutions leverage the HC‑SR04 in STEM curricula to teach principles of acoustics, signal processing, and embedded programming. The clear digital display aids students in visualizing sensor output, fostering a deeper understanding of how ultrasonic ranging works. Because the module includes an integrated processor, learners can focus on higher‑level application logic without delving into low‑level timing calculations.

Why Choose Us

HiLetgo’s reputation for quality and reliability is reflected in every component of the HC‑SR04 sensor. Each unit undergoes rigorous testing for accuracy, response time, and durability before leaving the factory, ensuring that customers receive a product that meets or exceeds industry standards. The inclusion of the STM8S103 processor distinguishes this module from generic ultrasonic sensors, providing on‑board computation that reduces latency and offloads processing from the host controller.

Our after‑sales support includes comprehensive documentation, example code libraries, and responsive technical assistance. Whether you are integrating the sensor into a complex automation system or a simple Arduino project, our team is ready to help troubleshoot and optimize performance. We also offer a 30‑day return policy and a one‑year warranty, underscoring our confidence in the product’s longevity.

Environmental responsibility is integral to HiLetgo’s manufacturing philosophy. The sensor’s components are sourced from suppliers who adhere to strict environmental guidelines, and the final product is packaged in recyclable materials. By choosing HiLetgo, you not only gain a high‑quality sensor but also support sustainable practices within the electronics industry.

Key Features

• Accurate distance measurement from 3 cm to 400 cm, ideal for precise positioning tasks.
• Integrated STM8S103 microprocessor handles echo timing, delivering fast and reliable readings.
• Clear digital tube display provides instant visual feedback without extra hardware.
• Compact 5 V design fits easily into tight spaces and works with most development boards.
• Comes with dedicated customer support and a one‑year warranty for peace of mind.

FAQ

What is the maximum measurement range of the HC‑SR04 sensor?

The sensor reliably measures distances from 3 cm up to 400 cm, making it suitable for both short‑range and medium‑range applications.

Do I need an external microcontroller to process the sensor data?

No. The built‑in STM8S103 processor calculates distance internally and outputs the result on the digital display, though you can still interface it with a microcontroller for advanced control.

Can the sensor operate in outdoor environments?

Yes. The module’s epoxy‑coated PCB and gold‑plated pins provide resistance to moisture and dust, allowing reliable operation in outdoor or industrial settings.

Is the sensor compatible with Arduino and Raspberry Pi?

Absolutely. The 5 V operating voltage and standard pin layout make it easy to connect to Arduino, Raspberry Pi, and other popular development platforms.

What warranty does HiLetgo offer for this product?

HiLetgo provides a one‑year warranty covering manufacturing defects, along with a 30‑day return policy for any issues that arise after purchase.