If you want to build a small robot with a motor, you are likely to reach for an L298N to interface your microcontroller to the motor, probably in an H-bridge configuration. [Dronebot] has used L298… ...

Electronics Speed Controllers for RC stuff usually have AT Mega chips. People flash some of them so that they work better for quadcopters, like my quad uses 4 $8 F-20 ESCs flashed with SimonK ...