Motoron M3S550 Triple Motor Controller Shield for Arduino (No Connectors) ESC it can combine with a

it can combine with a servo into a 180° measuring module to scan the obstacles at the range of 0~180°

The adjustable screw on it's back makes it very convenient for different purposes

one red and one white

if you want to continue to have access to the Raspberry Pi’s 40 GPIO pins while the A-Star is plugged in

Motoron M3S550 Triple Motor Controller Shield for Arduino (No Connectors) ESC it can combine with aThe Motoron M3S550 Triple Motor Controller Shield for Arduino makes it easy to control DC motors from an Arduino or Arduino compatible board through an IC interface. Each module can independently control up to three motors, and multiple shields can be stacked on top of the same Arduino for projects that need to control even more motors. The M3S550 supports motor supply voltages from 1. 8 V to 22 V and can deliver continuous output currents up to 1. 7