Warning : if the motor power supply is greater than 12V, you should remove the jumper to avoid the on-board 5V regulator from getting damaged.Also DO NOT supply power to both the motor power supply input and 5V power supply input when jumper is in place. And they both sink to a common ground named ‘ GND ’. ' Vss ' is used for driving the logic circuitry which can be 5 to 7V. Power Supply : From ' Vs ' pin the H-Bridge gets its power for driving the motors which can be 5 to 35V. The L298N is a dual-channel H-Bridge motor driver capable of driving a 2x DC motors, making it ideal for building two-wheel robots. This leads to a change in the direction of the motor. H-Bridge – For controlling rotation direction: An H-Bridge circuit contains four switches with the motor at the center forming an H, closing two particular switches at the same time reverses the polarity of the voltage applied to the motor. PWM – For controlling speed: PWM is a technique where average value of the input voltage is adjusted by sending a series of On/OFF pulses, the average voltage is proportional to the width of the pulses known as Duty Cycle.The higher the duty cycle, the greater the average voltage applied to the dc motor this lead to the highest speed.
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