Motor Shield V2.0

The Motor Shield is a driver module for motors that allows you to use Arduino to control the working speed and direction of the motor. Based on the Dual Full-Bridge Drive Chip L298, it is able to drive two DC motors or a step motor. The Motor Shield can either be powered directly by Arduino or by an external 6V~15V power supply via the terminal input. This module can be used for the development of micro robots and intelligent vehicles, etc

Features

Standard Arduino UNO Shield pin out
Based on L298 full bridge IC
Drive 2 DC Motor or 1 Stepper
External power input available
Led indicator
Heat sink for better performance
Arduino library

Specifications

Spec	Value
Operating Voltage	5V
External Power	6-15V
Output Current	2.0A Max @ Each Channel
PWM Range	0-100%
Output	2 Channels, 4 Ports

Hardware Overivew

1. Channel 1 indicator, include 3 leds

EB - channel 1 enable, high active
IN3 - status of OUT3
IN4 - status of OUT4

2. Channel 1 Sense - Please connect the left 2 pins together for normal usage.

Note that it's a high level application for sense the current, please refer to datasheet and schematic for more information.

3. OUTPUT - There're 2 channels, each channel has 2 output

Channel 0 - OUT1, OUT2
Channel 1 - OUT3, OUT4

4. Channel 0 Sense

5. Channel 0 indicator, include 3 leds

EB - channel 0 enable, high active
IN1 - status of OUT1
IN2 - status of OUT2

6. External Power Input, range 6-15V

7. Reset indicator - turn red when Reset button is pressed

8. Reset button - pressed to reset the shield and Arduino

9. Power indicator - turn green when power in, either internal or external

A. Power switch

Connect - Get power from Arduino
Disconnect - Get power from External sources

B. Standard Arduino shield pin out

Digital Pin Used

Arduino Pin	Function
D0	Not Used
D1	Not Used
D2	Not Used
D3	Not Used
D4	Not Used
D5	Not Used
D6	Not Used
D7	Not Used
D8	OUT1
D9	Enable of Channel0
D10	Enable of Chennel1
D11	OUT2
D12	OUT3
D13	OUT4

Note that D8~D13 was used by Motor Shield. Please don't use those pins to avoid conflict.

Analog Pin Used

Arduino Pin	Function
A0	Not Used
A1	Not Used
A2	Not Used
A3	Not Used
A4	Not Used
A5	Not Used

Note that Not Used means you can use those pins freely.

Getting Started

Here we will show you how to drive a dc motor and a stepper with this shield.

We need a Seeeduino V4 as the controller, Seeeduino V4 is an Arduino compatible board, and you can use an Arduino as well.

And you need a dc motor or a stepper for testing.

Download the library

Click the below button to download the library. If the library you had download include "-master", please remove it.

Drive a DC Motor

You can drive 2 DC motor with this shield. Here I will show you how to drive a DC motor.

You need to do some preparing first:

Set SEN_A and SEN_B, connect the left 2 pins together with a jumper.
Connect MB_EN together with a jumper, as we are no going use an external power.
Connect your DC motor to Chanel 0 (OUT1 and OUT2).

Then open motor_dc example in the library. Upload the code to Seeeduino V4.2.

//  Demo function:The application method to drive the DC motor.
//  Author:Loovee (luweicong@seeed.cc)
//  2016-3-11
 
#include "MotorDriver.h"
 
MotorDriver motor;
 
void setup()
{
    // initialize
    motor.begin();
}
 
void loop()
{
    motor.speed(0, 100);            // set motor0 to speed 100
    delay(1000);
    motor.brake(0);                 // brake
    delay(1000);
    motor.speed(0, -100);           // set motor0 to speed -100
    delay(1000);
    motor.stop(0);                  // stop
    delay(1000);
}
// END FILE

Then you will find your motor move (1s), stop (1s), move back (1s), stop (1s), and loop.

If there's nothing happen, please make sure:

You had uploaded the code successfully
Your motor connect right
The led indicators blink right

Drive a Stepper

You can drive a 4-wire stepper with this shield. Here I will show you how to drive a stepper.

You need to do some preparing first:

Set SEN_A and SEN_B, connect the left 2 pins together with a jumper.
Connect MB_EN together with a jumper, as we are no going to use an external power.

Find the pin definitions of you stepper, and connect it to the OUTPUT of the shield. As below:

Stepper	Motor Shield
A+	OUT1
A-	OUT2
B+	OUT3
B-	OUT4

Then open stepper_test example in the library, upload it to Seeeduino V4, then you will find your stepper move.

/*
 * Stepper test for Seeed Motor Shield V2
 * loovee @ 15 Mar, 2016
 */
 
#include <Stepper.h>
 
// change this to the number of steps on your motor
#define STEPS 200
 
// create an instance of the stepper class, specifying
// the number of steps of the motor and the pins it's
// attached to
Stepper stepper(STEPS, 8, 11, 12, 13);
 
// the previous reading from the analog input
int previous = 0;
 
void step(int steps)
{
    digitalWrite(9, HIGH);
    digitalWrite(10, HIGH);
    stepper.step(steps);
    digitalWrite(9, LOW);
    digitalWrite(10, LOW);
}
 
void setup()
{
    // set the speed of the motor to 30 RPMs
    pinMode(9, OUTPUT);
    pinMode(10, OUTPUT);
    digitalWrite(9, LOW);
    digitalWrite(10, LOW);
    stepper.setSpeed(30);
}
 
void loop()
{
    step(1000);
    step(-1000);
}
 
// END FILE

If there's nothing happen, please double check if you had connected the wire right.

Library APIs

begin

Description

Initialize the IOs, should be called at the very beginning of the code(maybe Setup()).

void begin();

speed

Description

Set speed, control by PWM.

void move(int motor_id, int speed);

motor_id

0 - Chanel 0
1 - Chanel 1

speed: -100~100, the larger the faster, 0 for stop

stop

void stop(unsigned char motor_id);

brake

void brake(unsigned char motor_id);