Description Unlike most of the Smart Tanks which rely on friction to drive the track, this newly designed metal body with acrylic plate Smart Tank has track gears directly connected to the power system to avoid track slipping issue. Together with the well-designed size and location of the bearings, this new smart Tank Robot Smart Car Chassis is ensured to have seamless motion. Note: Common Ground is needed for the Controller Board and the Tank. Pin Description:  GND: Ground Connection of LM393 and Speed Sensor VCC: Power Connection of LM393 and Speed Sensor IA: Motor Driver L9110 Reverse Input IB: Motor Driver L9110 Forward Input SPEED: Output of Speed Sensor M.P-: -ve Power Supply of L9110 and Motor M.P : ve Power Supply of L9110 and Motor