This module was written in accordance with the Curriculum and Assessment Standard Document for the subject of Technology Design (RBT). This module strengthens and equips junior readers aged between 4 to 15 years old with the knowledge and skills to learn electronic topics. This module is specially designed for readers with beginner knowledge in programming and microprocessor use. This book is specially designed for UNO Maker boards. This module can also be used for all Arduino UNO compatible microprocessor boards, such as CT-UNO. This book is usually accompanied by a set of student modules that can be used in conjunction with the tutor module. This module is built and written by teachers, for teachers; in collaboration with GMN Technologies Academy.GMN Academy is a social enterprise based in Malaysia. The current Academy is founded by 4 high school teachers whose mission is to provide quality and relevant STEM education for the underprivileged. Arduino emphasizes the spirit and principles of Open Source. The capital is also issued on the same principle.