This function lets you control speed of the motorsįurther, be sure to initialize ENA and ENB on PWM pins only. For PWM maximum possible values are 0 to 255 This function lets you control spinning direction of motors Set all the motor control pins to outputs The Arduino program for controlling a DC motor using the L298N driver is very straightforward. OUT B (13 and 14) are pins connected to Motor B. OUT A (1 and 2) are pins connected to Motor A. On the other hand, if one pin is HIGH and the other is LOW, it either rotates clockwise or counterclockwise.

If both pins are both LOW or HIGH, the designated motor stops. IN1 & IN2 (8 and 9) / IN3 & IN4(10 and 11) pins are to control the rotation direction of Motor A and Motor B, respectively. Connect to Arduino PWM output to control motor speed. Keeping the jumper in place (HIGH) makes the motor spin while disconnecting it (LOW) makes the motor stop. The most common motor driver for Arduino is the L298N.ĮNAand ENB(7 and 12) pins are to control the speed of Motor A and Motor B, respectively. Within it are embedded H-bridge circuits and PWM control. Motor drivers are circuit boards especially made for controlling DC motors. With these two techniques, you’ll gain complete control of a DC motor, where motor drivers enter. Closing a pair of switches at the same time changes the direction of the current flow, changing the direction of rotation. It is a circuit composed of four switches and a DC motor in the middle. On the other hand, H-bridges changes the spin direction of a DC motor.

There’s a more accessible alternative, though. Connect the PWM pin to the base of a BJT or gate of a FET to drive the high power DC motor. The amplifying transistor is required to operate appropriately. However, these pins only produce low power PWM signals. The PWM makes it easier to regulate DC motor speed. Thankfully, Arduino has designated PWM pins. Meanwhile, the lower the duty cycle, the lower the average voltage input, the slower the DC motor is. The higher the duty cycle, the higher the average voltage input, the faster the DC motor is. Moreover, the average voltage depends on the duty cycle (time on overtime off). These pulses are generally at a fast rate. It is a technique that allows us to regulate the average voltage input using ON and OFF pulses. PWM or Pulse Width Modulation is used to adjust the speed of a DC motor. With the combination of these two, you can alter your DC motor’s performance to fit your desired application. You can control a DC motor in these two aspects:

Qunqi l298n motor driver