The Motor Driver is the most important component in operating a DC motor using a Raspberry Pi. A Motor Driver is a specific circuit or integrated circuit that supplies the motor with the necessary power (or current) for smooth and safe operation. Even a modest 5V DC Motor uses a lot of current in the beginning, roughly 300–400 mA.
Because a motor requires a variable supply of 5 volts, it cannot be operated directly from the Raspberry Pi's GPIO ports. This implies that it must be powered separately. Motor controller add-on boards, on the other hand, can provide this functionality.
This Raspberry Pi add-on can drive up to 4 DC or 2 Stepper motors with full PWM speed control, making it ideal for any motion project. Because the Raspberry Pi has a limited number of PWM pins, we employ an onboard totally dedicated PWM driver chip to regulate motor direction and speed.
DC motors are high-speed, continuous-rotation motors that are commonly used for anything that requires a high rotation per minute (RPM). For example, car wheels, fans, and so on. Servo motors have a high torque and rotate quickly and precisely in a limited angle.
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