Introduction

This DC Motor Driver can be used in 4WD mobile robot platforms, combat robots, smart car competition, to drive pumps, electric fans, conveyors, etc. This module uses 4 high-performance & high-current driver chips - BTS7960 with the function of current short, over temperature, over voltage protection. You can control 2 motors with only 4 digital IO at the same time. Dual 15A@13.8V max output current, good responsiveness & braking performance. Four indicator leds are provided for easy and convenient debugging without motors. This DC Motor Driver module is directly compatible with Arduino.

Specification

Tutorial

Diagram

DC Motor Driver 2x15A diagram

LA_IS, LB_IS, RA_IS & RB_IS is for current sense and diagnosis.

In normal operation, the IS pin output a low level. In a fault condition, it will output a high level. The following code will show you how to do.

Sample Code

PWM mode

/*
 /*
 # This Sample code is for testing the DC Motor Driver 2x15A_lite module.

 # Editor : Phoebe
 # Date   : 2012.11.6
 # Ver    : 0.1
 # Product: DC Motor Driver 2x15A_lite
 # SKU    : DRI0018

 # Description:
 # Drive 2 motors with this DC Motor Driver module

 # Hardwares:
 1. Arduino UNO
 2. DC Motor Driver 2x15A_lite
 3. DC motors x2

 #Steps:
 1.Connect the M1_PWM & M2_PWM to UNO digital 5 & 6
 2.Connect the M1_EN & M2_EN to UNO digital 4 & 7
 3.Connect +5V & GND to UNO 5V & GND

 # Function for current sense and diagnosis,if you want to use
 please connect the IS pins to Arduino
 Connect LA_IS and RA_IS to UNO digital 2 at the same time
 Connect LB_IS and RB_IS to UNO digital 3 at the same time
 */

int E1 = 5;     //M1 Speed Control
int E2 = 6;     //M2 Speed Control
int M1 = 4;     //M1 Direction Control
int M2 = 7;     //M1 Direction Control
int counter=0;

void stop(void)                    //Stop
{
  digitalWrite(E1,0);
  digitalWrite(M1,LOW);
  digitalWrite(E2,0);
  digitalWrite(M2,LOW);
}
void advance(char a,char b)          //Move forward
{
  analogWrite (E1,a);      //PWM Speed Control
  digitalWrite(M1,HIGH);
  analogWrite (E2,b);
  digitalWrite(M2,HIGH);
}
void back_off (char a,char b)          //Move backward
{
  analogWrite (E1,a);
  digitalWrite(M1,LOW);
  analogWrite (E2,b);
  digitalWrite(M2,LOW);
}
void turn_L (char a,char b)             //Turn Left
{
  analogWrite (E1,a);
  digitalWrite(M1,LOW);
  analogWrite (E2,b);
  digitalWrite(M2,HIGH);
}
void turn_R (char a,char b)             //Turn Right
{
  analogWrite (E1,a);
  digitalWrite(M1,HIGH);
  analogWrite (E2,b);
  digitalWrite(M2,LOW);
}
void current_sense()                  // current sense and diagnosis
{
  int val1=digitalRead(2);
  int val2=digitalRead(3);
  if(val1==HIGH || val2==HIGH){
    counter++;
    if(counter==3){
      counter=0;
      Serial.println("Warning");
    }
  }
}

void setup(void)
{
  int i;
  for(i=4;i<=7;i++)
    pinMode(i, OUTPUT);
  Serial.begin(19200);      //Set Baud Rate
  Serial.println("Run keyboard control");
  digitalWrite(E1,LOW);
  digitalWrite(E2,LOW);
  pinMode(2,INPUT);
  pinMode(3,INPUT);
}

void loop(void)
{
  /*
  static unsigned long timePoint = 0;    // current sense and diagnosis,if you want to use this
   if(millis() - timePoint > 1000){       //function,please show it & don't forget to connect the IS pins to Arduino
   current_sense();
   timePoint = millis();
   }
   */
  if(Serial.available()){
    char val = Serial.read();
    if(val != -1)
    {
      switch(val)
      {
      case 'w'://Move Forward
        advance (255,255);   //move forward in max speed
        break;
      case 's'://Move Backward
        back_off (255,255);   //move back in max speed
        break;
      case 'a'://Turn Left
        turn_L (100,100);
        break;
      case 'd'://Turn Right
        turn_R (100,100);
        break;
      case 'z':
        Serial.println("Hello");
        break;
      case 'x':
        stop();
        break;
      }
    }
    else stop();
  }

}

PLL mode

DRI0018 motor drive also support PLL control mode. Data is as follows:

Pin Function
4 motor 1 enable control
5 motor 1 direction control
6 motor 2 direction control
7 motor 2 enable control

"PLL mode"

Demo data：

//Standard DLL Speed control

int E1 = 4;     //M1 Speed Control
int E2 = 7;     //M2 Speed Control
int M1 = 5;    //M1 Direction Control
int M2 = 6;    //M1 Direction Control

//When m1p/m2p is 127, it stops the motor
//when m1p/m2p is 255, it gives the maximum speed for one direction
//When m1p/m2p is 0, it gives the maximum speed for reverse direction

void DriveMotorP(byte m1p, byte m2p)//Drive Motor Power Mode
{

  digitalWrite(E1, HIGH);
  analogWrite(M1, (m1p));

  digitalWrite(E2, HIGH);
  analogWrite(M2, (m2p));

}

void setup(void) {
  int i;
  for(i=4;i<=7;i++)
    pinMode(i, OUTPUT);
  Serial.begin(19200);      //Set Baud Rate
}

void loop(void) {
  if(Serial.available()){
    char val = Serial.read();
    if(val!=-1){
      switch(val){
      case 'w'://Move Forward
        DriveMotorP(0xff,0xff); // Max speed
        break;
      case 'x'://Move Backward
        DriveMotorP(0x00,0x00);
        ; // Max speed
        break;
      case 's'://Stop
        DriveMotorP(0x7f,0x7f);
        break;
      }
    }
  }
}

Data function: input "w", "x", "s": motor will have corresponding reaction.

Trouble shooting

More question and cool idea, visit DFRobot Forum

More Documentation