Vol. 22, No. 2, June 2022 Received date 16/04/2022, Revised date 30/06/2022, Accepted date 05/08/2022 97 Jurnal Inovasi Vokasional dan Teknologi http://invotek.ppj.unp.ac.id/index.php/invotek ISSN: 1411 – 3411 (p) ISSN: 2549 – 9815 (e) The Automatic Onion Cutter Using Arduino Uno as Control System Tool Putra Jaya 1 , Hendra Hidayat 1 , Delsina Faiza 1 , Almasri 1 , Zulwisli 1 and Muhammad Aidil 1 1 Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Padang Jl. Prof. Dr. Hamka Kampus UNP, Air Tawar Padang, Indonesia-25131 *Corresponding author: putrajaya1962@ft.unp.ac.id, Doi: https://doi.org/10.24036/invotek.v22i2.1030 This work is licensed under a Creative Commons Attribution 4.0 International License Abstract Today's technological developments are growing rapidly, but there are still jobs that are done manually and semi- manually. This paper aims to develop a control system to coordinate the work of tools using an electric motor, which is very helpful in the process of cutting onions in large quantities and is more efficient in spending production costs because the tool designed is an automatic onion cutter. This research method begins with the collection of materials and data related to onion cutters, production of onion cutters, and testing of onion cutters. The measurement results of the tool show that every component in the automatic onion cutter works well and optimally; the measurement process is carried out properly and thoroughly. This optimal work result is supported by Arduino Uno. The Arduino Uno microcontroller acts as a tool controller. In the main system, the onion cutter is controlled by the Arduino Uno with the Arduino programming language. This automatic onion cutting system will work when the onion you want to cut has been inserted into a cross-section that has been equipped with an ultrasonic sensor, and then the onion cutting process is carried out. Compared with the manual method, the cutting time is almost the same. It's just that the advantages of slicing with this tool, the resulting slices are relatively more uniform. Besides that, another advantage is that it doesn't hurt the eyes of the onion slicer. So that this tool can be used by small entrepreneurs and onion farmers to increase productivity and the community's economy. Keywords: Onion, Automatic, Arduino Uno, Control System 1. Introduction The development of science and technology in the world of electronics and telecommunications. Currently progressing rapidly, this is proven by the existence of new discoveries that can minimize and streamline time and energy. With the developments in the world of electronics and telecommunications, humans are increasingly spoiled with the latest products in the field of electronics and telecommunications. With the expansion of the unions harvest in West Sumatra from year to year, the production of unions also increases [1]. Unions are a staple in cooking, especially in the culinary field. Unions as a raw material, even connoisseurs of taste in every dish. Therefore, the production and consumption of unions in West Sumatra is quite high, so a method of handling and processing of unions is required. This onion slicing machine is expected to support increased production of sliced unions, which are ready to be fried. On a small scale, the work can be done manually with a knife. Problems will arise if the production to be sliced or cut is available in large quantities. Therefore, the production and consumption of unions in West Sumatra are quite high, so a serious way of handling and processing unions is needed, such as drying unions [2], and includes onion cultivation [3]. The work of cutting onions can be done manually with a knife. Problems will arise if the product to be cut is available in large quantities, optimal effort is needed to cut the onion. Onion-cutting tools on the market are still semi-manual. The disadvantages include that this type cannot load in large quantities, and hands can get tired faster because they have to rotate it, as shown in Figure 1.