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L298 USER GUIDE
USER GUIDE FOR
L298 MOTOR DRIVER BOARD
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L298 USER GUIDE
Introduction:
Double H driver module uses ST L298N dual full-bridge driver.
It is a high voltage, high current dual full-bridge driver designed to accept standard
TTL logic levels and drive inductive loads such as relays, solenoids, DC and
stepping motors.
Features:
 Light weight, small dimension
 Super driver capacity
 Two enable inputs are provided to enable or disable the device
independently of the input signals
 2 DC motor/ 4 coil dual phrase stepper motor output
 4 standard mounting holes
Specifications:
 Driver: L298
 Driver power supply: +5V~+46V
 Driver peak current: 2A
 Logic power output Vss: +5~+7V (internal supply +5V)
 Logic current: 0~36mA
 Controlling level: Low -0.3V~1.5V, high: 2.3V~Vss
 Enable signal level: Low -0.3V~1.5V, high: 2.3V~Vss
 Max drive power: 25W (Temperature 75 oC)
 Working temperature: -25oC~+130oC
 Dimension: 55mm*45mm *18mm (l*b*h)
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L298 USER GUIDE
Hardware connection:
Pin configurations:
 Double H driver module can drive two DC motors at the same time.
 The board has a total of 10 pins.
 Enable 1 & 5V: These pins are to be shorted with a jumper if
the input signals have to control the motors, if in case the
control of the motors is dependent on the microcontroller data
then the enable pin has to be connected to the controller data
pins.
 Enable 2 & 5V: These pins are to be shorted with a jumper if
the input signals have to control the motors, if in case the
control of the motors is dependent on the microcontroller data
then the enable pin has to be connected to the controller data
pins.
 Digital port D1,D2,D3,D4:These four pins are used to control
the direction of the motor. D1 and D2 for one motor & D3 and
D4 for the other motor. For example D1=0, D2=1, motor 1=
forward & D3=0, D4= 1, motor 2= forward. Similarly if the
data is D1=1, D2=0 & D3=1, D4=0 the motors will rotate in
reverse direction.
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L298 USER GUIDE
 Table for enable and digital port:
ENABLE
0
1
1
D1
D2
D3
D4
(Motor 1)
(Motor 1)
(Motor 2)
(Motor 2)
0
0
1
1
1
0
0
0
1
1
1
0
DIRECTION
OF THE
MOTORS
No change
Clockwise
Anticlockwise
 Actual Hardware connections:
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L298 USER GUIDE
Driving motors with Arduino Uno and L298Motor DriverBoard
1.
Setting up Arduino Uno
 Connect the USB – Arduino cable from a PC USB port to the Arduino
port.
 Install Arduino-IDE on your PC.
 Connect to the arduino by going to Tools
Port
COM port
(which shows the arduino uno).
2.
Setting up L298Motor Driver Board
 Connect M1, M2 to Motor 1 and connect M3, M4 to Motor 2.
 Connect power supply to +, - pins. This power supply is for motors.
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L298 USER GUIDE
 Short both the enable pins with 5v pins if the motor has to driven only
with the input signals D1, D2, D3 and D4.
3.
Interfacing of Arduino Uno and L298
Arduino Uno
L298
5V
5V
Pin 5
D4
Pin 4
D3
Pin 3
D2
Pin 2
D1
GND
GND
 Connect the signal pins D1, D2, D3 and D4 to pins 2,3,4 and 5 (Any
4 digital pins on Arduino can be used).
 Connect the 5V pin and GND pin on L298 board to 5V pin and Gnd
pin on Arduino Uno.
4.
Implementation Code for Arduino Uno
const int D1 = 2;
const int D2 = 3;
const int D3 = 4;
const int D4 = 5;
// This means pin 2 on arduino will be called D1 in the below code. This is done as we have connected D1
of L298 and Pin 2 of Arduino.
void setup() {
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// initialize digital pins as an output.
pinMode(D1, OUTPUT);
pinMode(D2, OUTPUT);
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L298 USER GUIDE
pinMode(D3, OUTPUT);
pinMode(D4, OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(D1, HIGH); // turn the Motor 1 on (HIGH is the voltage level)
digitalWrite(D2, LOW);
digitalWrite(D3, HIGH); // turn the Motor 2 on
digitalWrite(D4, LOW);
delay(3000);
// Motors on for 3 seconds
digitalWrite(D1, LOW); // turn the Motor 1 on in reverse direction (LOW is the voltage level)
digitalWrite(D2, HIGH);
digitalWrite(D3, LOW); // turn the Motor 2 on in reverse direction.
digitalWrite(D4, HIGH);
delay(3000);
// Motors on for 3 seconds
}
For more help regarding Interfacing use the following link:
http://www.instructables.com/
For the details of the pin description of L298 you may refer the datasheet of the
chip which is available at
http://www.st.com/web/en/resource/technical/document/datasheet/CD00000240.pdf
Ordering Information
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L298 USER GUIDE
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