A Motor Driver is an electronic module that controls electric motors. It acts as an interface between a microcontroller (e.g., Arduino, ESP32) and a motor, since microcontrollers cannot supply sufficient current directly.
Motor drivers allow control of:
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Rotation direction (Forward / Reverse)
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Speed control via PWM
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Braking
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Protection features (in some models)
🔧 Main Functions
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Current amplification
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Direction control using an H-Bridge circuit
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PWM-based speed regulation
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Back EMF protection
⚙️ Types of Motor Drivers
1️⃣ DC Motor Driver (H-Bridge)
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For brushed DC motors
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Controls forward/reverse motion
2️⃣ Stepper Motor Driver
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Controls stepper motors
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Manages step count and direction
3️⃣ Servo Driver
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Controls multiple servo motors
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Operates via PWM or I2C
4️⃣ BLDC Motor Driver (ESC)
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For brushless DC motors
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Common in drones and high-speed systems
💡 Typical Applications
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Robot cars
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Robotic arms
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Conveyor systems
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CNC machines / 3D printers
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IoT and automation projects
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