This project was originally trying to use a couple SPI DAC modules to control a mirror galvanometer kit that was purchased from eBay. The basic kit included two galvanometers, a stand, two voltage feedback units and a +/- 15V switching power supply. The controller simply takes an analog voltage between -12 and 12v to position the mirror. Our intent was to use our DAC module which is capable of producing that voltage directly via an SPI signal. All components were mounted to a MDF and the laser was held in using a custom 3d printed holder.