If the motor supply voltage is up to 12V we can enable the 5V regulator and the 5V pin can be used as output, for example for powering our Arduino board. The module have an onboard 5V regulator which is either enabled or disabled using a jumper.
This depends on the voltage used at the motors VCC. The module can drive DC motors that have voltages between 5 and 35V, with a peak current up to 2A.The module has two screw terminal blocks for the motor A and B, and another screw terminal block for the Ground pin, the VCC for motor and a 5V pin which can either be an input or output. The L298N is a dual H-Bridge motor driver which allows speed and direction control of two DC motors at the same time.
By activating two particular switches at the same time we can change the direction of the current flow, thus change the rotation direction of the motor. On the other hand, for controlling the rotation direction, we just need to inverse the direction of the current flow through the motor, and the most common method of doing that is by using an H-Bridge.Īn H-Bridge circuit contains four switching elements, transistors or MOSFETs, with the motor at the center forming an H-like configuration. The low power Arduino PWM signal switches on and off the gate at the MOSFET through which the high power motor is driven. So depending on the size of the motor, we can simply connect an Arduino PWM output to the base of transistor or the gate of a MOSFET and control the speed of the motor by controlling the PWM output. The average voltage depends on the duty cycle, or the amount of time the signal is ON versus the amount of time the signal is OFF in a single period of time. PWM DC Motor Control PWM, or pulse width modulation is a technique which allows us to adjust the average value of the voltage that’s going to the electronic device by turning on and off the power at a fast rate. We will learn how to control DC motors using the L298N motor driver and the Arduino board. L298N Motor Driver with Arduino Codes, Schematics:
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