This unit of competency defines the skills and knowledge required to design an automated device for a machine or piece of equipment using a microcontroller. The automated device can use digital or analog input/output (I/O) and can involve feedback control. The microcontroller application can be an autonomous device or it can be integrated into a local area network (LAN) or distributed control system (DCS) using wired or wireless communications. It includes consideration of sustainability implications, work health and safety (WHS) and automation safety.The unit applies to the design of automated devices using microcontrollers, and design activities can also include reverse engineering and design rectification or modifications of an existing design. The unit is suitable for automated device or systems designers and maintenance personnel across all forms of manufacturing and engineering, and for those pursuing engineering or related qualifications and careers.Individuals completing this work either already have or are developing skills and experience in the application of basic computing, controllers, mathematics, electrical and electronic systems, and evaluation of microprocessor systems and safety procedures. Mechanical, fluid power, thermodynamic, manufacturing methods and processes experience may also be required by particular system designs.No licensing, legislative or certification requirements apply to this unit at the time of publication.