L298N Dual H Bridge Stepper Motor Driver Controller Board Module for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot(Pack of 2) by IFANCY-TECH Dual-channel H-bridge driver working mode creates higher working efficiency To avoid damage the voltage stabilizing chip, please use an external 5V logic supply when using more than 12V driving voltage Use large-capacity filter capacitors and diode with freewheeling protection function, increasing reliability Chip: L298N Large capacity filter capacitance,afterflow protection diode, more stable and reliable