L9110S H-bridge Stepper Motor Dual DC Motor Driver Controller Module Arduino - Image 1
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L9110S H-bridge Stepper Motor Dual DC Motor Driver Controller Module Arduino

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Wiring, Arduino code and troubleshooting for the L9110S dual H-bridge motor driver module. Covers two brushed DC motors, PWM speed and direction control, external…

Model: L9110S
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Description

🔧 L9110S Dual DC Motor Driver Module 2.5–12V H-Bridge | AuscomTech

The L9110S is a compact dual-channel motor drive board designed for controlling small DC motors and 4-wire 2-phase stepper motors from microcontroller GPIO signals.

Its dual H-bridge outputs allow independent forward and reverse control of two DC motors, while the four control inputs provide simple digital direction switching.

The small 28 × 21 mm PCB is well suited to robotics, compact automation projects, educational electronics and embedded motor-control systems.

⭐ Key Features

  • Dual Motor Control – drives two DC motors independently from separate control inputs.
  • Stepper Motor Support – suitable for controlling a 4-wire 2-phase stepping motor.
  • Wide Supply Range – operates from DC 2.5 V to 12 V.
  • Bidirectional Operation – H-bridge outputs provide forward and reverse motor direction control.
  • Microcontroller Interface – AIA, AIB, BIA and BIB inputs connect to external controller I/O signals.
  • Power Indicator – onboard indicator shows when module power is applied.
  • Compact PCB – approximately 28 × 21 mm for space-limited projects.
  • Mounting Holes – includes 3 mm mounting holes for secure installation.

📊 Technical Specifications

  • Driver IC: L9110S
  • Supply Voltage: DC 2.5–12 V
  • Maximum Operating Current: 0.8 A
  • Motor Channels: 2
  • Supported Loads: 2 × DC motors or 1 × 4-wire 2-phase stepper motor
  • Control Inputs: AIA, AIB, BIA, BIB
  • Motor Outputs: OA1, OB1, OA2, OB2
  • Power Connections: VCC and GND
  • PCB Size: approximately 28 × 21 mm
  • Mounting Hole Diameter: 3 mm

🧩 Typical Applications

  • Small DC motor control
  • 4-wire 2-phase stepper motor projects
  • Robotics and smart car projects
  • Embedded automation systems
  • Microcontroller-controlled mechanisms
  • Educational electronics projects

⚠️ Important Notes

  • Motor operating voltage must remain within the DC 2.5–12 V module supply range.
  • Maximum operating current is specified as 0.8 A.
  • AIA high with AIB low drives channel A in one direction; reversing the logic reverses the motor direction.
  • BIA high with BIB low drives channel B in one direction; reversing the logic reverses the motor direction.
  • OA1/OB1 and OA2/OB2 are the two motor output pairs.
  • Check motor voltage and current requirements before connecting power.

📦 Package Includes

  • 1 × L9110S Dual Motor Driver Module

🔗 Recommended Accessories (Not Included)

  • Microcontroller development board – provides GPIO control signals
  • DC 2.5–12 V power supply – powers the driver and connected motor
  • Jumper wires – connects the control and power pins
  • DC motor or 4-wire 2-phase stepper motor – compatible motor load

📌 Code Examples & Usage – L9110S Dual DC / Stepper Motor Driver Module

📋 Overview

The L9110S motor driver module is a compact dual H-bridge driver designed to control two DC motors or one small bipolar stepper motor. It is ideal for low-voltage, low-current motor control projects using Arduino, ESP32, ESP8266, and Raspberry Pi.

Common applications include:

  • Small robot cars

  • Line-following robots

  • Fan and pump control

  • Educational motor control projects

  • Lightweight stepper motor experiments

⚙ Key Features

  • Driver IC: L9110S

  • Motor channels: 2 (A & B)

  • Motor voltage: 5–12V DC (typical)

  • Control method: Logic-level IN pins

  • Can drive:

    • 2 × DC motors

    • 1 × small bipolar stepper motor

  • Simple wiring and low component count

⚠ IMPORTANT – Motor Limitations

🚨 This module is NOT suitable for high-current motors.

✔ Best for:

  • Small DC motors (TT motors, gear motors)

  • Small 4-wire bipolar steppers

❌ Not suitable for:

  • NEMA 17+ steppers

  • High-torque motors

  • CNC or 3D printer motors

📌 Typical current capability is ~800 mA peak (much lower continuous).

🔌 Pinout

Most L9110S boards expose:

Pin Function
A-1A Motor A input 1
A-1B Motor A input 2
B-1A Motor B input 1
B-1B Motor B input 2
VCC Motor & logic supply
GND Ground

📌 Logic and motor supply are usually shared.

🔌 Wiring – DC Motor Example

Motor A

  • Motor wires → Motor A terminals

  • Control pins → A-1A, A-1B

Motor B

  • Motor wires → Motor B terminals

  • Control pins → B-1A, B-1B

🔌 Wiring – Arduino Uno Example (DC Motor)

L9110S Arduino
A-1A D5
A-1B D6
B-1A D9
B-1B D10
VCC 6–9V motor supply
GND GND

📌 Arduino GND must be common with motor supply GND.

🧪 1️⃣ DC Motor Direction Control Example

int A1A = 5;
int A1B = 6;void setup() {
pinMode(A1A, OUTPUT);
pinMode(A1B, OUTPUT);
}

void loop() {
// Forward
digitalWrite(A1A, HIGH);
digitalWrite(A1B, LOW);
delay(2000);

// Stop
digitalWrite(A1A, LOW);
digitalWrite(A1B, LOW);
delay(1000);

// Reverse
digitalWrite(A1A, LOW);
digitalWrite(A1B, HIGH);
delay(2000);
}

🧪 2️⃣ Speed Control Using PWM

You can use PWM on one pin while holding the other LOW.

void loop() {
// Forward with speed control
digitalWrite(A1B, LOW);
analogWrite(A1A, 150); // 0–255
delay(3000);// Stop
digitalWrite(A1A, LOW);
digitalWrite(A1B, LOW);
delay(1000);
}

📌 Works on Arduino PWM-capable pins.

🧪 3️⃣ Bipolar Stepper Motor Example (4-Wire)

The L9110S can drive a small bipolar stepper motor using both channels.

Step Sequence (Full Step)

int A1A = 5;
int A1B = 6;
int B1A = 9;
int B1B = 10;void setup() {
pinMode(A1A, OUTPUT);
pinMode(A1B, OUTPUT);
pinMode(B1A, OUTPUT);
pinMode(B1B, OUTPUT);
}

void stepMotor(int step) {
switch (step) {
case 0:
digitalWrite(A1A, HIGH); digitalWrite(A1B, LOW);
digitalWrite(B1A, HIGH); digitalWrite(B1B, LOW);
break;
case 1:
digitalWrite(A1A, LOW); digitalWrite(A1B, HIGH);
digitalWrite(B1A, HIGH); digitalWrite(B1B, LOW);
break;
case 2:
digitalWrite(A1A, LOW); digitalWrite(A1B, HIGH);
digitalWrite(B1A, LOW); digitalWrite(B1B, HIGH);
break;
case 3:
digitalWrite(A1A, HIGH); digitalWrite(A1B, LOW);
digitalWrite(B1A, LOW); digitalWrite(B1B, HIGH);
break;
}
}

void loop() {
for (int i = 0; i < 4; i++) {
stepMotor(i);
delay(10);
}
}

📌 Suitable for small steppers only (e.g. 28BYJ-48 converted to bipolar).

🔋 Power Notes

✔ Use a motor supply matched to the motor rating
✔ Start at the lowest safe voltage
✔ Avoid powering motors directly from Arduino 5V
✔ Expect noise — keep motor wiring short

🧠 Common Issues & Fixes

Issue Cause Fix
Motor doesn’t move Wiring error Swap motor leads
Weak torque Low supply voltage Increase motor voltage
Arduino resets Motor noise Use external supply
Overheating Motor too large Use proper driver (L298N / TB6612 / A4988)
Stepper vibrates Wrong sequence Check step order

Additional information

Weight 20 g
Dimensions 260 × 160 × 20 mm

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