Design with Ultrasonic Distance Measurement Control Board Rangefinder 3 Bit LED Display in Cirkit DesignerThe Ultrasonic Distance Measurement Control Board, manufactured by diymore, is an electronic device designed to measure distances using ultrasonic waves. It integrates an HC-SR04 ultrasonic sensor with an 8-bit microcontroller unit (MCU) and a 3-bit LED display to provide immediate visual feedback. This component is commonly used in robotics, obstacle avoidance systems, parking sensors, and various automation projects where precise distance measurements are required.
This circuit is a distance measurement and communication system using an Arduino UNO, an ultrasonic sensor, an OLED display, and a SIM900A module. The ultrasonic sensor measures the distance to an object, which is then displayed on the OLED screen and transmitted via the SIM900A module. The system is powered by a 18650 Li-ion battery.
Open Project in Cirkit Designer
This circuit features an Arduino UNO microcontroller interfaced with two HC-SR04 ultrasonic distance sensors and a 20x4 LCD display over I2C for output. The Arduino controls a 2-channel relay module, which in turn switches an AC-powered LED bulb. The purpose of the circuit is likely to measure distances with the ultrasonic sensors and display the results or trigger the LED bulb based on certain conditions.
Open Project in Cirkit Designer
This circuit features an Arduino UNO microcontroller interfaced with three HC-SR04 ultrasonic sensors and multiple LEDs (red, yellow, green) to indicate different distance ranges detected by the sensors. The Arduino controls the LEDs based on the distance measurements, lighting up green for distances greater than 30 cm, yellow for distances between 10 and 30 cm, and red for distances less than 10 cm. Additionally, the circuit includes an ESP32 module for wireless communication, servos for actuation, a SIM800L GSM module for cellular connectivity, and a GPS module for location tracking.
Open Project in Cirkit Designer
This is an Arduino-based control system that uses ultrasonic sensors for distance measurement, displays data on an OLED screen, indicates status with a red LED, and controls a water pump. The system is likely designed for applications such as liquid level monitoring or proximity detection with visual feedback and actuator control.
Open Project in Cirkit Designer| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VCC | Power supply (5V DC) |
| 2 | TRIG | Trigger input (TTL pulse) |
| 3 | ECHO | Echo output (TTL level signal) |
| 4 | GND | Ground |
| 5 | OUT | Digital output (optional, not always used) |
// Define the pins for the ultrasonic sensor
const int trigPin = 9;
const int echoPin = 10;
void setup() {
// Initialize serial communication
Serial.begin(9600);
// Define sensor pins as input/output
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
// Clear the trigPin by setting it LOW
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Trigger the sensor by setting the trigPin high for 10 microseconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Read the echoPin; pulseIn returns the duration (length of the pulse)
long duration = pulseIn(echoPin, HIGH);
// Calculate the distance
int distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
// Display the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
// Delay between measurements
delay(500);
}
Q: Can the sensor measure distances beyond 4 meters? A: No, the maximum reliable range for the HC-SR04 is 4 meters.
Q: Is it possible to use this sensor with a 3.3V system? A: The sensor is designed for 5V operation. Using it with 3.3V may result in unreliable performance or no operation at all.
Q: How can I increase the refresh rate of the sensor? A: The refresh rate can be increased by reducing the delay between measurements, but ensure that the sensor has enough time to process the signal and provide a stable reading.