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DRV8833 2-Channel DC Motor Driver Module

Overview

The DRV8833 is a low cost (~$2) compact dual H-bridge motor driver module based on Texas Instruments’ DRV8833 IC. It’s designed to control two DC motors independently or one stepper motor in both forward and reverse directions. It’s popular in robotics and hobby electronics because it works with low-voltage logic (as low as 2.7 V) and can supply moderate motor currents without complex wiring.

It is available on ebay for under $2 USD.

Key Features

Feature Specification
Motor channels 2 (Dual H-bridge)
Motor voltage 2.7 V – 10.8 V (VM)
Logic voltage 2.7 V – 7 V (VL, typically tied to VM or 3.3/5 V logic)
Continuous output current \~1.2 A per channel
Peak output current \~2 A per channel (short bursts)
Control interface PWM, Direction pins
Built-in protection Over-current, short-circuit, under-voltage lockout, thermal shutdown
Dimensions \~18 mm × 16 mm (varies by manufacturer)

How It Works

The DRV8833 contains two full H-bridges, each able to drive a motor forward or backward.

  • Inputs: Each motor uses two logic inputs:

  • AIN1 / AIN2 for Motor A

  • BIN1 / BIN2 for Motor B
  • By applying PWM to one input and setting the other high/low, you control speed and direction.
  • It supports brake and coast modes.

Typical Pinout

Pin Function
VM Motor power supply (2.7 – 10.8 V)
GND Ground
AIN1, AIN2 Control inputs for Motor A
BIN1, BIN2 Control inputs for Motor B
AO1, AO2 Motor A outputs
BO1, BO2 Motor B outputs
nSLEEP Low to enter sleep mode, high to enable outputs (often tied high)

Note: Some breakout boards combine nSLEEP with VCC to keep it always active.

Advantages

  • Works directly with 3.3 V and 5 V logic without level shifters.
  • Compact and lightweight for small robots.
  • Quiet operation with PWM up to \~250 kHz.
  • Built-in fault protection reduces risk of damage.

Common Applications

  • Small robot cars with two DC motors
  • Driving a single bipolar stepper motor
  • Pan-tilt camera platforms
  • Automated toys
  • Small conveyor belts or mechanisms in DIY projects