T This research aims to design and implement an arduino-based control system to operate a micro electrical discharge machining (edm) machine. micro-edm machines are used to process conductive materials with high precision, especially in the manufacture of micro-features on precision components. however, the operation of micro-edm machines often requires complex control. in this research, arduino atmega 2650 is used as the main control platform because of its flexible capabilities and easy programming. the developed control system includes monitoring edm process parameters such as current, voltage, and automatic electrode positioning. the system hardware consists of arduino atmega 2560, current and voltage sensors, and a motor driver for electrode movement. to test the system performance, a series of tests were conducted on the working material in the form of stainless steel with a thickness of 2 mm, using electrodes measuring 7.5 x 10²μ (750μ) / 0.75 mm. the test includes three scenarios: (1) cutting a straight line parallel to the y axis with 8 cutting points, a distance between points of 2 mm, and a total length of 14 mm. (2) cutting a straight line with an inclination angle of 50° through 8 cutting points, a distance between points of 2 mm. (3) cutting a circle with a diameter of 22 mm at 8 even angles (0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°). the experimental results show that the arduino-based control system can produce various cutting patterns from straight lines to circular cuts. the findings of this research indicate that arduino can be an effective alternative for controlling micro-edm machines, especially in the context of research and development. this system not only increases the accessibility of micro-edm technology for researchers but also opens up opportunities for further development in precision manufacturing application