We report a capacitance monitoring methodology for achieving arbitrary polarization rotation from nematic liquid crystals. By locking to the distinctive capacitance related to the molecular orientation, iTagPro any polarization rotation may be achieved with improved accuracy over a large temperature vary. A modified relaxation oscillator circuit that can simultaneously decide the capacitance and iTagPro shop drive the rotator is presented. OCIS codes: (230.3720) Liquid-crystal devices