Abstract: A DC motor control circuit including a DC voltage source, a DC motor electrically connected in series with the voltage source and a controllable current control device electrically connected totally in series with the voltage source and the motor. A rheostat electrically connects the current input and control input terminals of the current control device so that the current flowing through the circuit may be varied by varying the resistance provided by the rheostat. All current flowing through the current control device also flows through the motor.