L9110S 2-Channel Motor driver: Circuit, Pinout, and How to work [Video&FAQ]

The L9110S 2-Channel motor driver module is a tiny board for controlling small robots. This module contains two motor driver chips, each capable of driving up to 800mA of continuous current. The boards may function between 2.5 and 12 volts, allowing this module to work with both 3.3 and 5-volt microcontrollers.

This module is connected to a microcontroller through a set of female header pins. Two sets of screw terminals are used to connect the motors.

A PWM (Pulse Width Modulation) signal is used to control a motor's speed, while a digital output is utilized to modify its direction. A single four-line two-phase stepper motor can also be driven with this module. This board has four holes that make it simple to attach to your robot or other projects.

• Two independent L9110S  motor driver chips 

• 800mA continuous current per channel

• Can drive two bidirectional DC motors or a four-line two-phase stepper motor 

• Four mounting holes

The following shows L9110S Pin Configuration.

Pin Configuration

More detailed information is given below.

Pinout

Motor driver modules are frequently used to control the speed and direction of motors nowadays. One of them is the L9110S dual-channel module. Two  DC  motors and one stepper motor can be controlled using this module. It is based on the L9110 integrated circuit. The following are the main characteristics:

• The allowable continuous current for each channel: 800 mA

• The maximum allowable current: 1.5 A

• Power supply: 2.5V to 12V

• Low quiescent current

• 800mA continuous current output capability per channel

• Lower saturation voltage

• TTL / CMOS output level compatible, and can be directly connected to the CPU

• Output built-in clamp diodes for inductive load

• Integrated control and drive into a monolithic IC

• With pin high-voltage protection function

• Operating temperature: 0 ℃ -80 ℃

• Motor Voltage: 2.5 ~12V

• Number of Channels: 2

• Max Continuous Current per Channel: 800mA

• Dimensions: 31mm x 22mm x 12mm

The diagram below shows how to link Arduino to these modules. Connect the wires in the proper order.

Diagram

The L9110S Schematic Diagram is shown as follows.

Schematic Diagram

L9110S Sample Sketch

Sample Sketch

How to Test

The components to be used are:

• Microcontroller (any compatible arduino)

• L9110 2-channel motor driver

• Pin connectors

• DC motors

• 2.5V-12V DC external power supply

1. Use pin connectors to connect the components. The VCC pin is connected to a 2.5V12V DC external power source capable of handling 800mA, the GND pin to the GND, and the A-IA, A-IB  , B-IA, and B-IB  pins to the digital I/O ports. The pin number will be determined by the program code.

2. After the hardware is connected, open the Arduino IDE  and load the sample sketch.

3. Connect the microcontroller's ports to the PC with a USB connection.

4. Put the application on the computer.

The two motors should travel forward and backward every two seconds, according to the program. Depending on the wire connections, the orientation may change.

Program

The following shows L9110S Dimension.

Dimension