The Radar HLK-LD 2413 is a compact radar sensor designed for distance measurement and object detection. Operating in the 24 GHz frequency range, this sensor offers high accuracy and reliability, making it suitable for a wide range of applications. Its small form factor and robust design allow it to perform effectively in challenging environments.
Explore Projects Built with Radar HLK-LD 2413
Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
This circuit features an Arduino UNO microcontroller interfaced with an RF 433 MHz Transmitter, a Transmitter RF Module, an LCD screen with I2C communication, and a doppler radar sensor. The Arduino controls the RF transmission and processes the doppler radar's signal, likely for motion detection purposes. The LCD screen is used to display information or statuses, and the RF modules enable wireless communication, possibly to transmit the processed radar data.
This circuit features an ESP32 microcontroller interfaced with a BH1750 light sensor, a DHT22 temperature and humidity sensor, and two LD2410C radar sensors. The ESP32 collects environmental data from the sensors and can communicate with the radar sensors via UART for motion detection.
This circuit features a STM32 Nucleo F303RE microcontroller interfaced with three HC-SR04 ultrasonic sensors for distance measurement and a 20x4 LCD display over I2C for data output. Additionally, there is a WS2812 RGB LED strip controlled by the microcontroller for visual feedback. The power supply provides a common 5V to the LCD, ultrasonic sensors, LED strip, and the microcontroller's +5V input, with all components sharing a common ground.
This circuit features an Arduino Mega ADK (Rev3) microcontroller interfaced with multiple HC-SR04 ultrasonic sensors and an IR receiver, suggesting a system designed for distance measurement and remote control. The L298N motor driver is connected to the Arduino and two DC motors, indicating the capability to drive motors based on sensor inputs or remote commands. A toggle switch and 9V batteries are included for power management and supply.
Automotive systems (e.g., collision avoidance, parking assistance)
Industrial automation (e.g., object detection on conveyor belts)
Smart home devices (e.g., motion detection for security systems)
Robotics (e.g., obstacle detection and navigation)
Traffic monitoring and management systems
Technical Specifications
Below are the key technical details of the Radar HLK-LD 2413:
Parameter
Value
Operating Frequency
24 GHz
Detection Range
0.3 m to 30 m
Operating Voltage
5 V DC
Operating Current
≤ 60 mA
Output Interface
UART (TTL level)
Communication Baud Rate
115200 bps
Detection Angle
±15°
Operating Temperature
-40°C to +85°C
Dimensions
25 mm x 25 mm x 6 mm
Pin Configuration and Descriptions
The Radar HLK-LD 2413 has a 4-pin interface for power and communication. The pinout is as follows:
Pin Number
Pin Name
Description
1
VCC
Power supply input (5 V DC)
2
GND
Ground
3
TX
UART Transmit (data output from the radar module)
4
RX
UART Receive (data input to the radar module)
Usage Instructions
How to Use the Radar HLK-LD 2413 in a Circuit
Power Supply: Connect the VCC pin to a stable 5 V DC power source and the GND pin to the ground of your circuit.
UART Communication: Connect the TX pin of the radar module to the RX pin of your microcontroller (e.g., Arduino UNO) and the RX pin of the radar module to the TX pin of the microcontroller.
Data Processing: Use the UART interface to receive distance and object detection data from the radar module. The data is transmitted in a predefined format at a baud rate of 115200 bps.
Important Considerations and Best Practices
Ensure that the radar module is mounted securely and oriented correctly for optimal detection performance.
Avoid placing the module near strong electromagnetic interference (EMI) sources, as this may affect its accuracy.
Use a level shifter if your microcontroller operates at 3.3 V logic levels, as the radar module uses 5 V TTL logic.
Maintain a clear line of sight between the radar module and the target object for accurate measurements.
Example Code for Arduino UNO
Below is an example Arduino sketch to interface with the Radar HLK-LD 2413 and read data via UART:
// Example code to interface with Radar HLK-LD 2413 using Arduino UNO
// This code reads data from the radar module and prints it to the Serial Monitor.
#include <SoftwareSerial.h>
// Define the RX and TX pins for SoftwareSerial
SoftwareSerial radarSerial(2, 3); // RX = Pin 2, TX = Pin 3
void setup() {
// Initialize hardware serial for debugging
Serial.begin(9600);
Serial.println("Radar HLK-LD 2413 Test");
// Initialize software serial for radar communication
radarSerial.begin(115200); // Baud rate for radar module
}
void loop() {
// Check if data is available from the radar module
if (radarSerial.available()) {
// Read and print the data from the radar module
String radarData = radarSerial.readStringUntil('\n');
Serial.println("Radar Data: " + radarData);
}
delay(100); // Small delay to avoid flooding the Serial Monitor
}
Troubleshooting and FAQs
Common Issues and Solutions
No Data Received from the Radar Module
Cause: Incorrect wiring or baud rate mismatch.
Solution: Double-check the connections between the radar module and the microcontroller. Ensure the baud rate is set to 115200 bps in your code.
Inaccurate Distance Measurements
Cause: Obstructions or interference in the radar's line of sight.
Solution: Ensure there are no obstacles or reflective surfaces near the radar module that could cause signal distortion.
Module Overheating
Cause: Operating the module outside its specified voltage range.
Solution: Verify that the power supply provides a stable 5 V DC and does not exceed the module's current rating.
Intermittent Communication
Cause: Loose connections or noisy power supply.
Solution: Secure all connections and use a decoupling capacitor (e.g., 10 µF) across the power supply pins to filter noise.
FAQs
Q1: Can the Radar HLK-LD 2413 detect multiple objects simultaneously?
A1: No, the module is designed to detect the nearest object within its detection range.
Q2: Is the module waterproof?
A2: No, the Radar HLK-LD 2413 is not waterproof. It should be used in environments where it is protected from moisture.
Q3: Can I use the module with a 3.3 V microcontroller?
A3: Yes, but you will need a level shifter to safely interface the 5 V logic of the radar module with the 3.3 V logic of your microcontroller.
Q4: What is the maximum detection range of the module?
A4: The Radar HLK-LD 2413 can detect objects up to 30 meters away under optimal conditions.
Open Project in Cirkit Designer
