This study discusses the process of making an airspeed control device for wind tunnels using Arduino as the main component of the controller unit. Wind tunnel testing is carried out at varying airspeeds to obtain optimal results. The fan motor is not equipped with an air speed controller as an airflow generator. This research aims to make a tool that can control wind tunnel airspeed according to the testing needs. This research was conducted using the research and development method. The power supply voltage output is set at 11.19 Volts as the Arduino voltage source, and for other components such as LCDs, servo motors, relay modules, and anemometer sensors supplied from the Arduino mainboard plus and arranged in parallel with the power supply source reduced using a stepdown to 5.069 Volts. This subsonic wind tunnel's airflow speed control device can regulate the speed from 10 m/s to 13 m/s stably. This speed meets the requirements of a subsonic wind tunnel and can be used to visualize the airflow in the wind tunnel.