Development of a keyboard equipped with Arduino microcontroller

Tema ovoga rada je izrada prototipa tipkovnice prilagođene osobi s invaliditetom, kako bi joj se omogućilo nesmetano korištenje računala u svrhu igranja specifične video igre pri čemu je ostavljena mogućnost prenamjene tipkovnice za neku drugu svrhu. 3D model prototipne tipkovnice izrađen je u programskom paketu SolidWorks, prema zahtjevima korisnika. Model je ispisan pomoću 3D printera FDM metodom. Nakon konstrukcijskog dijela, osmišljen je i prikazan način upravljanja tipkovnicom pomoću Arduino Uno mikrokontrolera te popratnih dijelova poput kratkospojnih žica, otpornika itd. U skladu s primarnom namjenom, napisan je kod kojim je programirana tipkovnica. Trenutno je ona programirana za igranje određene igrice, ali se ista tipkovnica može naknadno reprogramirati u bilo koju drugu svrhu jednostavnom izmjenom upravljačkog koda Arduina. Na posljetku je još izvršen prijenos napisanog koda s računala na samu tipkovnicu. Taj postupak naziva se flashanje i izvršen je pomoću softvera Flip 3.4.7, kako bi računalo putem USB priključka prepoznalo Arduino Uno kao HID tipkovnicu.The topic of this paper is the development of a prototype keyboard adapted for a person with a disability, in order to enable uninterrupted use of computer for the purpose of playing a specific video game, leaving the possibility of reprogramming the keyboard for another purpose. The 3D model of the prototype keyboard was created in the SolidWorks software package, according to user requirements. The model was printed using a 3D printer with the FDM method. After the construction part, the way of running the keyboard with the Arduino Uno microcontroller and the accompanying parts such as short-circuited wires, resistors, etc. was designed and shown. Currently, it is programmed to play a particular game, but the same keyboard can be reprogrammed for any other purpose by simply changing the Arduino control code. Finally, it is necessary to transfer the written code from the computer to the keyboard itself. This procedure is called flashing and was performed using Flip 3.4.7 software, so that the computer can recognize the Arduino Uno as a HID keyboard via a USB port