![]() Also in the arduino code for dc motor control above, we have used Serial.available() = 0 statement to wait for user input.The following video demonstrates the speed and direction control of DC motor using Arduino and L298N motor driver. This read value is passed into the forward() and reverse() function for speed control of a DC motor using Arduino. We have used Serial.ParseInt() function to read integer from IDE serial monitor for PWM value. In the arduino dc motor speed control code above, we have used forward(), reverse() and stop() function that gets called for forward rotation or backward rotation with specified pwm value or to stop the motor. For example in this case, pwm value of 100 or lower will not cause the motor to rotate. Depending upon the motor, low value might not cause the motor to rotate. Larger value means more turn on time and thus more power is delivered to the motor. This speed value represents the PWM signal pulse width that is sent to the motor. If the user enters either f or r, then the speed is asked. The user either enters f, r or s for forward direction, reverse direction or to stop the motor. The speed and direction are asked to users on Arduino IDE serial monitor. In the above arduino pwm motor control example code, user are asked for the direction first. Serial.println("Enter Reverse Speed(0 to 255):") Serial.println("Enter Forward Speed(0 to 255):") Serial.println("\nEnter Direction(f=forward,r=reverse,s=stop):") Program for DC motor speed control using PWM with L298N & Arduino Here we have applied PWM signal during the forward and reverse direction. Here we have used only +5V to drive simple DC motor.The implementation of the above circuit schematic is shown below.Īrduino code for DC motor speed control with PWM using L298Nīelow is Arduino code for DC motor speed control using L298N. This Vs pin should be connected to the higher voltage source in theĪbove L298N motor driver Schematic if higher rated DC motor is used. Is connected to the +5V supply which is used to drive the DC motor. Voltage(can be connected to +5V of the Arduino). The Vss(or Vcc) pin of the L298N is connected to the +5V logic Sensing which are simply connected to ground in this example tutorial. Shown in the schematic diagram to avoid any unwanted reverse current Four 1N4004(or use 1N4001) diodes are connected as 1 include ![]() The OUT1 and OUT2 of the L298N are connected to two wires Then, connect the servo motor to +5V, GND and pin 9. By sending LOWįrom the Arduino we can switch off the first dual H-bridge of the L298NĪnd by sending HIGH from Arduino we can turn on the first dual H-bridge L298N is connected to the digital pin 8 of the Arduino. The speed is controlled by sending PWM signal onto the pin 10 or pin 9. The direction is controlled by making pin 10 high and pin 9 low and vice versa. By sending signal from the Arduino on these L298N pinsĬontrols the direction of the motor rotation. In the above circuit schematic drawing, the inputs of L298N motor driver IN1(pin 5) and IN2(pin 7) are connected to the pin 10 and pin 9 of Arduino ![]()
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