Microcontroller based multimeter

Ideja završnog rada je izrada multimetra pomoću Arduina platforme. Kako bi se ideja ostvarila bilo je potrebno istražiti i proučiti sustave koji čine multimetar. Multimetar se sastoji od ampermetra, ohmmetra i voltmetra koji su u početku bili napravljeni svaki posebno tako da postoji i mogućnost da se može odabrati bilo koji sustav mjerenja za izradu, a ne cijeli multimetar. Koristeći razne module pokušavalo se učiniti Arduino multimetar što preciznijim, a i na neki način modernijm dodavanjem OLED zaslona. Pri programiranju je bilo potrebno proučiti kako funkcioniraju biblioteke modula koje su olakšale stvari pri računanju određenih rezultata jer su već imale implementirane funkcije. Multimetar je testiran i ima zadovoljavajuće rezultate koji donekle variraju, ali treba uzeti u obzir i razne čimbenike koji utječu na sustav. Takvi čimbenici su općenito otpori u vodičima i pogreške modula. Unatoč pogreškama glavna ideja završnog rada je ostvarena.The main idea of the final thesis is to make multimeter based on Arduino platform. In order to realize the idea, it was necessary to research and study the systems that make up a Multimeter. The multimeter consists of an Ammeter, Ohmmeter and Voltmeter that were initially made separetly so that there is possibility that only one measuring system can be selected for fabrication rather than the entire multimeter. Using various modules, an attempt was to make the Arduino multimeter as precise as possible, and in a way more modern by adding OLED display. When programming, it was necessary to study how module libraries work, which made things easier when calculating certain results because they already had implemented functions. The multimeter has been tested and has satisfactory results that vary somewhat, but it should be taken into account that various factors affect the system. Such factors are generally resistances in the conductors and module errors. Despite the errors the main idea of the final thesis is achieved