Motor Driver in Robotics — Complete Guide
188 words · 1 min read
A motor driver is an electronic circuit that lets a low-power microcontroller control a high-power motor. The bridge between brain (Arduino) and muscle (motor).
The concept concept: A motor driver is an electronic circuit that
Difficulty 3/5 · ClassroomA motor driver (sometimes called motor controller) is an electronic circuit that takes low-power control signals from a microcontroller (e.g., 5 V PWM from Arduino) and switches a much higher-power supply to drive a motor.
💡 Think of it like…
Think of it like a household object that does the same job — the underlying idea is the same, just adapted for robots.
🇮🇳 In India
L293D, L298N, TB6612 — all motor-driver ICs widely sold in Indian electronics shops at ₹50–₹200.
Why it matters
Without motor driver in robotics — complete guide, many concept systems in robotics simply couldn't work.
🤯 Modern motor drivers can shut themselves down in 1 microsecond if they detect over-current — faster than you can blink.
🎯 Quick challenge
Why is a motor driver needed between a microcontroller and a motor?
Motor Driver in Robotics
What is it?
A motor driver (sometimes called motor controller) is an electronic circuit that takes low-power control signals from a microcontroller (e.g., 5 V PWM from Arduino) and switches a much higher-power supply to drive a motor.
How it works
Most DC-motor drivers use an H-bridge of four power transistors (MOSFETs or BJTs). Closing diagonal pairs of transistors lets current flow through the motor in either direction. The microcontroller sends a PWM signal that the driver translates into motor voltage, controlling both direction (which diagonal is active) and speed (PWM duty cycle).
Real-world example
L298N (the classic ₹120 driver from Robu.in) is the standard for beginner Arduino projects. TB6612FNG is more efficient. For BLDC motors, dedicated ESCs (Electronic Speed Controllers) act as motor drivers. Every robot's motors are connected to a motor driver.
Why it matters for robotics
Without motor drivers, microcontrollers literally cannot move motors. Choosing the right motor driver — matched to current, voltage, and motor type — is one of the most common entry-level mistakes.
See also
Ask R2 Co-pilot anything you didn't understand about Motor Driver in Robotics — Complete Guide. It'll explain it plainly.
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Last updated · 2026-05-21
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