Dual Channel DC Motor Driver Shield Expansion Board L298NH (FS01113)
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Produs:Nou, Fără garanție
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Numar articol:189472915
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Disponibilitate:Indisponibil
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Preț:42,00 Lei
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Anuntul a expirat la:16.05.2019, 08:06
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Specificatii
The Motor Shield is based on the L298NH, 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.
•You can find in the Getting Started section all
the information you need to configure your board, use the Arduino
Software (IDE), and start tinker with coding and
electronics.
Technical
specs
Operating
Voltage 5V
to 12V
Motor
controller
L298HN, 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
Power
The 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 (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.
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.
The shield can supply 2 amperes per channel, for a
total of 4 amperes maximum.
Input and
Output
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:
Function
pins per Ch.
A pins per Ch.
B
Direction
D12
D13
PWM
D3
D11
Brake
D9
D8
Current
Sensing
A0 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.
Motors
Connection
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.
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