mLink L9110 DC Motor Controller

The mLink L9110 motor controller is a serial (I2C) 2 channel DC motor driver that is capable of driving up to two DC motors at a maximum current of 800mA per motor. It is capable of independently controlling the motors direction and speed with a resolution of 255 steps in each direction.

If control of more than 2 motors is required multiple modules can be linked together and controlled from the same I2C bus. The module includes screw terminals for convenient connector of the motors and external motor power.

Compatible with microcontrollers equipped with an I2C interface, including popular Arduino models, wireless ESP devices, and Raspberry Pi, this module offers versatile control options. As part of the mLink series, it seamlessly integrates with other mLink modules. This means you can easily daisy-chain multiple mLink modules, enabling centralised control through a single serial interface.

For Arduino users you can use the mLink library (see below for library and examples) to control any type of mLink module. Only one single instance of the library is needed to control multiple types of mLink modules resulting in very little resource overhead and therefore making it great for Arduinos with small amounts of memory and pin counts.

For Raspberry Pi users we have a Python module which can be installed via pip or downloaded and installed directly from our forum. Please see the mLink Python forum thread for requirements and download link here: viewtopic.php?f=131&t=3062&p=8592#p8592




 

Module code: 						    HCMODU0199
Supply voltage (VDD): 		            		    3.3V to 5.5V
Current consumption (idle):		                    TBA 6mA
I2C Interface speed:					    400kbits/s (fast mode)
I2C default address (HEX):				    0h5D
Maximum number of modules:		    	            5 with pullups fitted, 112 with pullups removed*
Motor supply voltage (via 1+ & 2+):		            2.5V to 12V
Motor max current (continuous):	    	                    800mA per channel
Motor speed resolution:			    	            256 steps in both forward and reverse directions
Motor duty cycle time:			    	            12.8ms			
Module dimensions ex headers (LxWxH):	                    41mm x 37mm x 13mm

*Note the maximum number of connected modules will depend on cable lengths and power requirements of each module. Do not exceed 5 mLink modules connected in series with I2C pullups fitted to all modules. For disconnecting pullups see forum post.



Arduino Connection Example:

Raspberry Pi Connection Example:



Please note: when connecting to a Raspberry Pi the mLink modules I2C pullup resistors should be removed. See the 'Removing the modules I2C pullup resistors' section below for more information.

More information, including example sketches, library download, spec and register map available on our support forum here.