分光计是传统的光学仪器，在物理实验教学中有广泛的应用。由于读数方法复杂且精度低于人眼分辨率，传统分光计已经很难适应当前的教学要求。本论文基于电动转台搭建了一个电动分光计原型，利用电动转台替代传统分光计的转轴，并根据步进电机的驱动脉冲读出角度变化。基于开源硬件Arduino制作了一个带角度显示的电动转台控制器，并实际测量了其定位精度和测角精度。

Spectrometer is an optical apparatus that is wildly used in physics laboratory. The application of traditional spectrometer is hindered by its inconvenient reading system and insufficient angular resolution. In this work, I construct a prototype of a motorized spectrometer based on a motorized rotation stage. The angle difference is read out directly from the count of pulsations fed to the stepper motor. A controller with angle indicator is built by using the open source hardware Arduino. Finally, the precision of location and angular resolution of the motorized spectrometer are tested.