The Arduino Motor Shield is based on the L298 (datasheet), which is a dual full-bridge driver 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. The shield is TinkerKit compatible, which means you can quickly create projects by plugging TinkerKit modules to the board.

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

The maximum length and width of the Motor Shield PCB are 2.7 and 2.1 inches respectively. Four screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.

(:div id='commentsbox':)

(:cell:)

The Arduino Motor Shield is based on the L298 (datasheet), which is a dual full-bridge driver 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. The shield is TinkerKit compatible, which means you can quickly create projects by plugging TinkerKit modules to the board.

The Arduino Motor Shield must be powered only by an external power supply. Because the L298 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.

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.

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.

Brushed DC motor. You can drive two Brushed DC motors by connecting the two wires of each one in the (+) and (-) screw terminals for each channel A and B. In this way you can control its direction by setting HIGH or LOW the DIR A and DIR B pins, you can control the speed by varying the PWM A and PWM B duty cycle values. The Brake A and Brake B pins, if set HIGH, will effectively brake the DC motors rather than let them slow down by cutting the power. You can measure the current going through the DC motor by reading the SNS0 and SNS1 pins. On each channel will be a voltage proportional to the measured current, which can be read as a normal analog input, through the function analogRead() on the analog input A0 and A1. For your convenience it is calibrated to be 3.3V when the channel is delivering its maximum possible current, that is 2A.

(:cell:)

EAGLE files: arduino_MotorShield_Rev3-reference-design.zip

Schematic: arduino_MotorShield_Rev3-schematic.pdf

The Arduino Motor Shield is based on the L298 (datasheet), which is a dual full-bridge driver 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 current absorption of each motor, among other features. The shield is TinkerKit compatible, which means you can quickly create projects by plugging TinkerKit modules to the board.

The Arduino Motor Shield must be powered only by an external power supply. Because the L298 IC mounted on the shield has two separate power units, one for the logic and one for the motor supply driver.The current draw for the motor supply is often than the USB can give.

To avoid possible damage to the Arduino board on which the shield is mounted, we reccomend using 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.

• Vin on the screw terminal block, is the input voltage to the motor connected to the shield. An external power supply connected to this pin also provide power to the Arduino board on which is mounted. By cutting the "Vin Connect" jumper you make this a dedicated power line for the motor.

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

This shield have 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 unipolar stepper motor.

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

If you don't need the Brake and in 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.

The additional sockets on the shield are described as follow:

• Screw terminal to connect the motors and their power supply.

Motors connections

Brushed DC motor. You can drive two Brushed DC motors by connecting the two wires of each one in the (+) and (-) screw terminals for each channel A and B. In this way you can control its direction by setting HIGH or LOW the DIR A and DIR B pins, you can control the speed by varying the PWM A and PWM B duty cycle values. There are also the Brake A and Brake B pins that if setted in HIGH state they brakes the DC motor faster than when you power off the motor. You can know the current going through the DC motor by reading the SNS0 and SNS1 pins. On each channel will be a voltage proportional to the measured current, which can be read as a normal analog input, through the functions analogRead() on the analog input A0 and A1. For your convenience it is calibrated to be 3.3V when the channel is delivering its maximum possible current, that is 2A.

The Arduino Motor Shield must be powered only with an external power supply. The reason for that is because the L298 IC mounted on the shield has two separated power units, one for the logic part and one for the driver part that provide the power to the motor and often the request is more than the USB can give.

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

• Vin on the screw terminal block, is the input voltage to the motor connected to the shield. An external power supply connected to this pin also provide power to the Arduino board on which is mounted. Cutting the "Vin Connect" jumper this become a dedicate power line for the motor.

• GND Ground on the screw terminal block.

• Screw terminal block where to connect the motors and their power supply.

• 2 TinkerKit connectors for two Aanlog Outputs (in orange in the middle), connected to PWM outputs on pins D5 and D6.

(:table border=0 align=centre:) (:cell:) (:cell:) (:cellnr:)Arduino Motor Shield R3 Front (:cell:)Arduino Motor Shield R3 Back

(:table border = 0 :) (:cell:) (:cell:) (:tableend:)

The Arduino Motor Shield must be powered only with an external power supply. The reason for that is because the L298 IC mounted on the shield have two separated power units, one for the logic part and one for the driver part that provide the power to the motor and ofen the request is more than the USB can give.

External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector.

To avoid possibile damages to the board on which is mounted we recomend to use an external power supply that provide a voltage between 7 and 12V. If your motor require a power supply higher than 9V we also recommend to separate the power lines of the shield and the Arduino board on which is mounted. This is possible cutting the "Vin Connect" jumper placed on the back side of the shield. The absolute limit for the Vin is 18V.

The power pins are as follows:

• Vin on the blue screw socket, is the input voltage to the motor connected to the shield. An external power supply connected to this pin also provide power to the Arduino board on which is mounted. Cutting the "Vin Connect" jumper this become a dedicate power line for the motor.

• GND Ground on the blue screw socket.

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

This shield have two separated 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 pin involved in the shield usage, divided by channel are shown in the table:

If your are not interested in the Brake and in 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 to restore the originary pin function.

The addictional sockets on the shield are described as follow:

• Blue Screw socket where to connect the motors and their power supply.

• 2 TinkerKit connectors for two Analog Inputs (in white), connected to A2 and A3.

• 2 TinkerKit connectors for two Aanlog Outputs (in orange), connected to PWM outputs on pins D5 and D6.

• 2 TinkerKit connectors for the TWI interface (in white with 4 pins), one for input and the other one for output.

The maximum length and width of the Motor Shield PCB are 2.7 and 2.1 inches respectively. Four screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.

Arduino Motor Shield

''Arduino Motor Shield R3 front

Overview

The Arduino Motor Shield is based on the L298 (datasheet), which is a dual full-bridge driver 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 current absorption of each motor, amongst other extra features. The shield is TinkerKit compatible, which means you can quickly create projects by plugging TinkerKit modules to the board.

Summary

Schematic & Reference Design

EAGLE files: arduino_MotorShield_Rev3-reference-design.zip

Schematic: arduino_MotorShield_Rev3-schematic.pdf

Power

Input and Output

Physical Characteristics

The maximum length and width of the Uno PCB are 2.7 and 2.1 inches respectively. Four screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.