RS011MC Motor Driver 4 Channel 4.5A 12V

From the shop's description

4 Channel DC Motor Controller with Encoder Support Each channel is rated for 4A of stall current and each channel has its own current monitoring circuit. Low resistance FET “H” bridges ensure high efficiency and good motor torque. Built in control logic allows each motor to be controlled by 2 pins. One pin for speed and one for direction. As it is specifically designed for the Rover 5 chassis, the PCB includes a quadrature encoder mixing circuit. The mixing circuit takes the 8 inputs of the 4 quadrature encoders and generates 4 outputs. These outputs are suitable for interrupt generation and high resolution speed control. This compact PCB is just 91mm x 65mm and is a perfect companion for the Spider robot controller. Features 4x low resistance FET “H” bridges. Each channel rated for 4A stall current. Easy to use control logic. Current monitoring for each channel. Quadrature encoder mixing circuitry. Documents User Manual Schematics