High voltage power supplies (HVPS) have various applications in the field of charged particle optics such as in ion sources, ion detectors and electrostatic lens. For these equipment to perform optimally, the output voltage of the HVPS needs to be very stable. To control the HVPS, an analogue control voltage is used. Current solutions utilize digital to analogue converters that can output a voltage which is both high resolution and very stable, such as the AD5791. However, they tend to be pricey and have long development times. In this paper, we aim to find the viability of using the STM32F407G-DISC1, a cheap microcontroller board with a built-in DAC, in controlling HVPS by investigating the ripple and long-term drift (LTD) of the output voltage. We found that the STM32F407G-DISC1 output voltage’s ripple was significantly greater than the AD5791, being 43.55 times greater at best and 414.69 times greater at worst. This resulted in the output voltage of a HVPS to have greater ripple and LTD when controlled by the STM32F407G-DISC1. Despite the poor output voltage ripple and LTD, STM32 boards show promise to be used for rapid prototyping due to its quick development time. Further investigation can be done into other microcontrollers with a built-in DAC.