Ultrasonic Sensor Module | 2-4.5M Range | HC-SR04 Compatible 3-5V

The RCWL-1601 is an ultrasonic sensor. It measures distances from 2cm to 4.5 meters. This ranging module has an I2C interface. This saves I/O pins on your microcontroller compared to older sensors. It is good for complex electronics projects. Features and Benefits - I2C Communication - This RCWL-1601 ultrasonic distance sensor uses just two wires for data. This frees up GPIO pins on your Arduino or Raspberry Pi for other components. - Wide Operating Voltage - The module runs on a 3V-5V power supply. This makes it directly compatible with most common microcontrollers. You won't need extra logic level converters. - 2cm to 4.5m Detection Range - It can accurately measure both very close and medium-range distances. This makes the RCWL-1601 ultrasonic sensor useful for many different robotics projects. - Simplified Wiring - The I2C interface is a key difference when comparing the RCWL-1601 vs HC-SR04 ultrasonic sensor. It greatly simplifies the connection process. Applications - Robotic Navigation - Add an Arduino ultrasonic sensor RCWL-1601 to a mobile robot. It will help with obstacle detection and avoidance. - Tank Level Monitoring - Measure the fluid level in a water tank or the grain level in a silo from above. It works without direct contact. - Presence Detection - Use it to detect when a car has pulled into a garage. You can also create interactive art installations that respond to a person's proximity. How It Works An ultrasonic sensor, such as this Ultrasonic Sensor Module, operates by emitting and receiving high-frequency sound waves. These sound waves, typically at 40 kHz, are beyond the range of human hearing. The module uses a piezoelectric transducer to send out a pulse of sound. This pulse travels through the air, reflects off an object, and then returns to the sensor. The sensor measures the time taken for the sound to travel to the object and back. This time measurement is then used to calculate the distance to the object. This module is compatible with HC-SR04 systems. The Formula The distance measured by an ultrasonic sensor is calculated using a simple formula based on the speed of sound. The sensor emits a sound wave, and upon receiving the echo, it records the elapsed time. The formula for distance is: Distance = (Time of Flight × Speed of Sound) / 2. The division by two accounts for the sound wave travelling to the object and then returning. For this Ultrasonic Sensor Module, which has a Measurement Range of 2-4.5m, the speed of sound in air (approximately 343 metres per second at room temperature) is a key factor in accurate distance determination. Key Components This Ultrasonic Sensor Module, a type of ultrasonic distance sensor module, comprises several essential components for its operation. At its core are two piezoelectric transducers. One acts as a transmitter, converting electrical signals into ultrasonic sound waves, while the other functions as a receiver, converting the returning sound waves back into electrical signals. The module also includes control circuitry to manage the timing of the emitted pulses and the reception of echoes. This specific module operates at a voltage between 3-5V and features an I2C interface for communication. Common Applications Ultrasonic sensors like this Ultrasonic Sensor Module are widely used for non-contact distance measurement. In robotics, they are essential for obstacle avoidance, allowing robots to navigate without collisions. For industrial automation, they can detect the presence or absence of objects on conveyor belts or measure fluid levels in tanks. This module, with its 2-4.5m Measurement Range and 3-5V Operating Voltage, is also suitable for various DIY electronics projects requiring precise distance sensing. Its HC-SR04 compatibility further broadens its application potential. Advantages & Limitations A key advantage of this Ultrasonic Sensor Module is its ability to measure distances in a non-contact manner, making it suitable for delicate objects or environments where physical contact is undesirable. It is also relatively unaffected by ambient light conditions, unlike some optical sensors. However, ultrasonic sensors can be affected by factors such as soft, sound-absorbing materials, which may not reflect sound waves effectively. The accuracy can also be influenced by air temperature and humidity, which affect the speed of sound. This module operates within a 2-4.5m range.