Copyright : © the author(s), publisher and licensee Technoscience Academy. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non- commercial use, distribution, and reproduction in any medium, provided the original work is properly cited International Journal of Scientific Research in Science, Engineering and Technology Print ISSN: 2395-1990 | Online ISSN : 2394-4099 (www.ijsrset.com) doi : https://doi.org/10.32628/IJSRSET207477 301 Manufacture of High Current Low Voltage Power Supply with Using the Mot (Microwave Oven Transformer) Arman Hidayat Sirait, Kerista Tarigan, Marhaposan Situmorang Department Physics, Faculty of Mathematics and Natural Science, University of North, Sumatra, Medan, Indonesia Article Info Volume 7 Issue 4 Page Number: 301-306 Publication Issue : July-August-2020 Article History Accepted : 20 Aug 2020 Published : 30 Aug 2020 ABSTRACT The manufacture of low voltage high current power supply using the MOT (Microwave Oven transformer) has been done. The purpose of this work is to convert low voltages into high currents by utilizing simple electrical equipment. This work use of varying voltages and different windings which are changed on the secondary winding section with a cable size of 240 mm 2, NYA cable type. The test is carried out with a series circuit, parallel circuit, and single circuit by utilizing a voltage of 30 V, 60 V, 90 V, 120 V and 5 different variations of winding. The results of this test provide knowledge of new methods that can be applied to iron smelting. Keywords : Microwave Oven Transfomer, Microcontoller, Current sensor SCT 103, Liquid Crystal Display. I. INTRODUCTION Design of making this power supply is based on the need for high electric current The times that are very fast now need progress sufficient technology modern, for the sake of smoothing the life of the economy and wheels health. Therefore the need for electronic devices that are able to meet these needs, basically humans really need quite a lot of electricity in everyday life but because of the limited supply of electricity, we are required to make savings on a large scale, so the need for tools that can convert low voltages to be high current or more commonly known as power supply. For the use of this power supply there are still not many around us, because it requires special handling by parties who are skilled enough, so that the tool to convert low voltage into high current can only be used in certain tools. The large number of tools used to convert low voltages to high currents has not been supported by the availability of tools. The use of a power supply to convert low voltage to high current is not cheap enough, but in a day's wasted many used items in the form of an electric microwave can be used for the power supply.low threshold. DC high current engineering components consist of: IGBT diode (insulated-gate bipolar transistor), oscillator, driver and MOT. Under these conditions, a problem arises to generate high currents with the simplest possible circuit. One of the methods of generating high voltage currents is using a microwave oven transformer (MOT).