7A Dual DC Motor Driver SKU: DRI0041

From DFRobot Electronic Product Wiki and Tutorial: Arduino and Robot Wiki-DFRobot.com

Introduction

This is an ultra small Dual DC motor driver for some room limited projects. UVLO (Under Voltage Latch-Out) features a safe guard for your system. It is very considerate to own an Photo Coupler isolation for all the signals in case of that the motor's Reverse Current would interfere the control signals. Besides all, all the interfaces includes ESD (electro-static discharge) protection.


Specification

Dimension
  • Voltage supply: DC 7 ~ 24 V
  • Voltage supply limit: 6.5 ~ 27 V
  • Control signal Level (Compatible 3.3V/5V)
    • High: DC 3.0 ~ 6.5 V
    • Low: DC0 ~ 0.8 V
  • Output Channel: 2
  • Control signal current: 3 ~ 11 mA (Each route)
  • Maximum continuous operating current: 7 A
  • Peak current: 50 A
  • Speed control: PWM
    • Minimum valid Pulse Width: 5 us
  • Working Temperature: -25 ~ 85 °C
  • Mounting Hole: M3
  • Dimension (Length * Width * Height): 55 x 55(mm)/2.165 x 2.165(in)
  • Weight: 32g


Board Overview

DFR0041 overall.png
Num Label Description
1 9 - 24V Power Supply, +
2 PGND Power Supply, GND
3 OUT1 Motor1_+
4 OUT2 Motor1_-  
5 OUT3 Motor2_+
6 OUT4 Motor2_-
7 ENA Motor1 PWM
8 IN1 Motor1 control signal
9 IN2 Motor1 control signal
10 ENB Motor2 PWM
11 IN3 Motor2 control signal
12 IN4 Motor2 control signal
13 +5V

Voltage Reference Input, +5V OR 3.3V

Control Method


IN1 IN2 ENA/ ENB Motor1/2 Behavior
0 0 x Stop (brake)
1 1 x Vacant
1 0 1 Forward 100%
0 1 1 Reverse 100%
1 0 PWM Forward at PWM speed
0 1 PWM Reverse at PWM speed
In this table
  • IN1 & IN2: the control signal input to change the motor behavior
  • "0": TTL_Low
  • "1": TTL_High
  • "x": Any TTL, and it is default TTL_Low while no PWM signal.
  • "ENA/ ENB": PWM speed setting


Note:

  1. IN1 & IN2
    • To protect your motor, before switching the motor steering direction, make sure firstly to BRAKE motor by setting IN1 - 0 & IN2 - 0, especially when the PWM was set as 100%, full speed. And the suggestion time to brake is >0.1S, depending on your motor.
  2. +5V
    • When the microcontroller operation voltage is 5V/3.3V, then please connect the reference voltage 5V/ 3.3V from the microcontroller. Or you will fail to control motors.


Tutorial

This tutorial will cover how to use PWM to control a motor using the shield. Do the wiring according to the Connection Diagram below, and then upload the sample code below to the Arduino card, here we use a arduino UNO as the controller, you could see your motor run forward for 3 second and then run reversely for another 3 seconds and repeat this behavior then.


Requirements

  • Hardware
    • 1 x DFRduino UNO (or similar)
    • 1 x This 7A Dual DC Motor Driver
    • 2 x DC Motor
    • 1 x Fuse@20A
    • Jumper wires


Connection Diagram

framless
Warning yellow.png
Back view, conductive layer
  • Facility Safety and the Personal Safety:
    • Please add a fuse@20A between the Power source and this shield.
  • Installation Tips
    • The backside of the driver, as right-hand picture shows, that its conducting layer can be very wide, so you should take some measurements to ensure it won't short-circuit, like applying 1mm layer conductive epoxy or any other similar materials.


Pluggable Connector


You may find that the connector is designed as pluggable type to adapt with Male or Female wires.


pluggable connector


Sample Code

/*
* @file Motor driver DRI0042_Test.ino
* @brief DRI0042_Test.ino  Motor control program
*
* control motor positive inversion
* 
* @author bernie.chen@dfrobot.com
* @version  V1.0
* @date  2016-8-10
*/
const int IN1=5;
const int IN2=4;
const int ENA=6;

const int IN3=8;
const int IN4=7;
const int ENB=9;

void setup() {
     pinMode(IN1, OUTPUT);
     pinMode(IN2, OUTPUT);
     pinMode(ENA, OUTPUT);
     
     pinMode(IN4, OUTPUT);
     pinMode(IN3, OUTPUT);
     pinMode(ENB, OUTPUT);
}

void loop() {
 Motor1_Brake();
 Motor2_Brake();
 delay(100);
 Motor1_Forward(200);
 Motor2_Forward(200);
 delay(1000);
 Motor1_Brake();
 Motor2_Brake();
 delay(100);
 Motor1_Backward(200);
 Motor2_Backward(200);
 delay(1000); 
}

void Motor1_Forward(int Speed) 
{
     digitalWrite(IN1,HIGH); 
     digitalWrite(IN2,LOW);  
     analogWrite(ENA,Speed);
}
  
void Motor1_Backward(int Speed) 
{    
     digitalWrite(IN1,LOW); 
     digitalWrite(IN2,HIGH);  
     analogWrite(ENA,Speed);
}
void Motor1_Brake()      
{
     digitalWrite(IN1,LOW); 
     digitalWrite(IN2,LOW); 
}     
void Motor2_Forward(int Speed) 
{
     digitalWrite(IN3,HIGH); 
     digitalWrite(IN4,LOW);  
     analogWrite(ENB,Speed);
}
  
void Motor2_Backward(int Speed) 
{    
     digitalWrite(IN3,LOW); 
     digitalWrite(IN4,HIGH);  
     analogWrite(ENB,Speed);
}
void Motor2_Brake()
{
     digitalWrite(IN3,LOW); 
     digitalWrite(IN4,LOW); 
}


FAQ

Q1. General Arduino Problems/FAQ/Tips

A. Click the topic link on DFRobot Forum.


For any questions, advice or cool ideas to share, please visit the DFRobot Forum.


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Category: DFRobot > Sensors & Modules > Motors & Actuators & Drivers > DC Motor Drivers