MotorDriver. - Here is Circuit Scematic Driver DC Motor with Transistor for Small Current. Do you want to build robot now? One of the urgent part robot is driver motor. Driver motor used to amplify control signal from microcontroller or robot data control. With motor driver, robot motor can rotate to the right and to the left or motor robot can move clock-wise and anti-clock-wise. Many robot that be moved with dc motor. Like in Line Follower Robot that very popular today. In LFR need dc motor to move..