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L298HN Motor Shield Rev3

Online support document provided upon request.

Based upon Arduino's Motor Shield REV3.

The L298HN Motor Driver Shield is based around the L298 driver chip designed to drive inductive loads such as relays, solenoids, DC and stepping motors.

It lets you drive two DC motors with your Arduino board, controlling the speed and direction of each one independently.

You can also measure the motor current absorption of each motor, among other features.

Fits Arduino UNO or other Arduino with compatible I/O pins.

Resources:

Schematic

Power (IMPORTANT!)

The L298HN motor shield must be powered only by an external power supply.

Because the L298HN IC mounted on the shield has two separate power connections, one for the logic and one for the motor supply driver.

The required motor current often exceeds the maximum USB current rating.

External (non-USB) power can come either from an AC-to-DC adapter or battery.

The adapter can be connected by plugging a 2.1mm center-positive plug into the Arduino's board power jack on which the motor shield is mounted or by connecting the wires that lead the power supply to the Vin and GND screw terminals, taking care to respect the polarities.

To avoid possible damage to the Arduino board on which the shield is mounted, it is recommended to use an external power supply that provides a voltage between 7 and 12V.

If your motor require more than 9V we recommend that you separate the power lines of the shield and the Arduino board on which the shield is mounted.

This is possible by cutting the "Vin Connect" jumper placed on the back side of the shield.

The absolute limit for the Vin at the screw terminals is 18V.

The shield can supply 2 amperes per channel, for a total of 4 amperes maximum.

Driving DC Motors

This shield has two separate channels, called A and B, that each use 4 of the Arduino pins to drive or sense the motor.

In total there are 8 pins in use on this shield.

You can use each channel separately to drive two DC motors or combine them to drive one bipolar stepper motor.

The shield's pins, divided by channel are shown in the table below:

	Speed Pins	Speed Control	Direction Pins	Direction Control		Brake	Current Sensing
Motor A	D3	PWM 0-100	D12	HIGH = Forward	LOW = Reverse	D9	A0
Motor B	D11	PWM 0-100	D13	HIGH = Forward	LOW = Reverse	D8	A1

If you don't need the Brake and the Current Sensing and you also need more pins for your application you can disable this features by cutting the respective jumpers on the back side of the shield.

Specifications:

Operating Voltage : 5V to 12V

Motor controller : L298NH, Drives 2 DC motors or 1 stepper motor

Max current : 2A per channel or 4A max (with external power supply)

Current sensing : 1.65V/A

Free running stop and brake function

Package includes:

1x L298HN Rev3 Motor Driver Shield

1x DuPont cable 10-wire (Please specify either Male to Female, Female to Female or Male to Male: subject to stock. May consist of one or sections).

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