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Hand sanitizer dispenser machine model, in this course teaches students how to create an automatic sanitizer dispenser that works without physical contact. Through this practical project, learners explore the use of sensors, circuits, and automation in everyday life. The course explains how infrared (IR) or ultrasonic sensors detect the presence of a hand and activate a small motor or pump to release sanitizer automatically. Using simple materials like a sanitizer bottle, plastic tubes, sensors, motors, batteries, and wires, students learn to build a working prototype. This course enhances understanding of electronics, hygiene technology, and innovation in public health. Ideal for science fairs and STEM projects, it promotes awareness of hygiene, encourages problem-solving, and introduces real-world applications of automation and smart systems in a simple, hands-on way. howtofunda