DAOKAI Mini L298N DC Motor Driver Module Instruction Manual

1. Introduction

This manual provides detailed instructions for the DAOKAI Mini L298N DC Motor Driver Module. This compact module is designed to control DC motors and 4-wire two-phase stepper motors, offering features like speed regulation and direction control. It is suitable for various applications, including battery-powered smart cars, toy cars, and robotics projects.

Image 1.1: Overview of the DAOKAI Mini L298N DC Motor Driver Modules and included Dupont cables.

2. Product Features

• Efficient Driver Chip: Utilizes a professional driver chip with built-in low on-resistance MOS switch, resulting in minimal heat generation and no need for an external heat sink.
• Dual H-Bridge Design: Capable of simultaneously driving two DC motors or one 4-wire two-phase stepper motor.
• High Current Capacity: Each channel supports a continuous operating current of 1.5A, with a peak current capability of up to 2.5A.
• Overheating Protection: Features an integrated overheating protection circuit (TSD) with hysteresis effect to prevent damage from motor stalls. The module automatically recovers once the temperature decreases.
• Anti-Common State Conduction: A built-in circuit prevents motor malfunction if input terminals are left floating.
• Low Power Consumption: Designed for low power consumption with a standby current of less than 0.1uA, making it ideal for battery-powered applications.
• Compact Size: Small and lightweight design (24.7 x 21 x 5 mm) for easy integration into various projects.

Image 2.1: The motor driver module showcasing its compact size and key features like overheating protection and double H-bridge.

3. Package Contents

The package includes the following items:

• 5 x Mini L298N DC Motor Driver Modules
• 1 x 40-Pin Header
• 1 x 40-Pin Female to Male Dupont Cable

Image 3.1: The retail packaging showing the included components.

4. Specifications

Image 4.1: Visual representation of the module's key electrical parameters.

Image 4.2: Detailed dimensions of the motor driver module.

5. Setup

Follow these steps to connect the DAOKAI Mini L298N DC Motor Driver Module:

1. Power Supply Connection: Connect your DC power source (2V-10V) to the '+' and '-' terminals on the module. Ensure correct polarity.
2. Motor Connections: Connect your DC motors to the 'MOTOR-A' and 'MOTOR-B' output terminals. Each motor requires two connections.
3. Control Signal Input: Connect your microcontroller (e.g., Arduino) to the IN1, IN2, IN3, and IN4 pins. These pins control the direction and speed of the motors.

Image 5.1: Wiring diagram illustrating power, motor, and control signal connections for the module.

6. Operating Instructions

The module controls DC motors using the IN1, IN2 (for Motor-1) and IN3, IN4 (for Motor-B) input pins. The signal voltage range for these inputs is 1.8V-7V. Refer to the truth table below for control logic:

Note:

• "1" represents a high logic level.
• "0" represents a low logic level.
• "PWM" indicates Pulse Width Modulation, which can be used to adjust motor speed by varying the duty cycle.
• IN1 and IN2 control DC Motor A; IN3 and IN4 control DC Motor B. The two circuits operate independently.
• The input terminal INx has an anti-common state conduction function, meaning it acts as a low-level input when floating.

Image 6.1: Logic truth table detailing how to control motor direction and speed using the input pins.

Image 6.2: Example application of the motor driver module integrated into a small robotic car.

7. Maintenance

The DAOKAI Mini L298N DC Motor Driver Module is designed for durability and requires minimal maintenance. To ensure optimal performance and longevity:

• Keep Clean: Regularly inspect the module for dust or debris and gently clean with a soft, dry brush if necessary.
• Avoid Moisture: Protect the module from water and excessive humidity, which can cause short circuits and damage.
• Proper Storage: When not in use, store the module in a dry, anti-static environment, away from extreme temperatures.
• Inspect Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.

8. Troubleshooting

If you encounter issues with your motor driver module, consider the following troubleshooting steps:

• No Motor Movement:
  • Verify power supply voltage is within the 2V-10V range and correctly connected.
  • Check motor connections for secure contact.
  • Ensure control signals (IN1-IN4) are correctly applied according to the operating instructions.
  • Confirm the motor itself is functional.
• Incorrect Motor Direction:
  • Review the operating instructions and truth table to ensure the correct logic levels are applied to IN1/IN2 or IN3/IN4 for the desired direction.
  • You can reverse motor direction by swapping the motor's two wires.
• Module Overheating:
  • Check if the motor is stalled or drawing excessive current (above 1.5A continuous or 2.5A peak).
  • Ensure the power supply voltage is not too high, especially if the motor is drawing high current.
  • Verify there are no short circuits on the output terminals or between outputs.
• Module Not Responding:
  • Check for reverse polarity connection of the power supply, which can damage the chip.
  • Inspect for any visible damage to the module.

9. Safety Precautions

Adhering to these safety precautions will help prevent damage to the module and ensure safe operation:

• Correct Power Polarity: Always pay close attention to the positive and negative poles of the power supply. Reversing the polarity will cause immediate damage to the chip and circuit.
• Avoid Short Circuits: Do not short-circuit the output terminals to ground or to each other. This can lead to excessive current draw and chip damage.
• Prevent Motor Stalls: While the module has overheating protection, prolonged motor stalls, especially at higher voltages (near 10V) and peak currents exceeding 2.5A, can still lead to chip damage.
• Voltage and Current Limits: Operate the module within its specified voltage (2V-10V) and current (1.5A continuous, 2.5A peak) limits to prevent overheating and damage.
• Handle with Care: Electronic components are sensitive. Handle the module carefully to avoid physical damage or electrostatic discharge.

10. Warranty and Support

For warranty information or technical support regarding your DAOKAI Mini L298N DC Motor Driver Module, please refer to the seller's return policy or contact the manufacturer directly through their official channels. Keep your purchase receipt for any warranty claims.