Abstract: A transducerless position determining system and method of using the same for determining the relative position of a mechanical member or component which is driven by an electric motor within an electromechanical system. The transducerless position determining system includes a microcontroller with a software model that simulates the acceleration, deceleration and velocity characteristics of the electric motor as a function of applied voltage thereto and the load characteristics of the electromechanical system. The applied voltage is sampled electronically to monitor its amplitude level, and microcontroller software and associated circuitry is used to accurately detect application and removal of the applied voltage to the electric motor.