Design and construction of automatic alcohol gel dispenser.

Abstract

This paper presents an innovative research, which aimed at designing and building automatic alcohol gel dispensers. Taking into account the usage patterns of various office buildings with people going in and out all day the design therefore focuses on the durability of continuous use. The device is 1 meter high and made of 1-inch box steel. It has an infrared object sensor for detecting the outstretched hand to pick up the alcohol gel so that the user does not have to touch the device. Exposure to various germs use a small DC gear pump to suction and dispense alcohol gel. Control the amount of alcohol gel to avoid dispensing too much or too little alcohol gel by setting the working time of the DC gear pump. In an experiment on 20 volunteers, the majority of subjects were satisfied with the alcohol gel content of approximately 1 milligram, with 158 milliseconds of operating time of the alcohol gel pump. While the machine is running and while dispensing the alcohol gel Controlled and processed with Microcontroller Arduino Nano.  Expert evaluation with satisfaction scoring and open-ended questionnaires were used as a research  instrument. It is found that the evaluation results received the highest score in 2 points: performance the average score of 5 was on the highest level and usefulness. The average score of 5 points is in the highest level, with the least score on the appearance of the device, 3.00 points are moderate and the average satisfaction score of 4.47 points is in the high level