Fully Functional Automatic Drink Dispenser

ENG:This project presents a fully functional automatic beverage/cocktail dispensing device, developed as my engineering thesis project. I decided to share it as an open project for the maker community.The enclosure is designed in modular segments, allowing all parts to be printed on a standard 220 × 220 × 250 mm 3D printer (I used an Ender 3). The printed parts are assembled using dowel joints for easy alignment and structural stability. To improve the final appearance and hide visible seams and 3D printing layer lines, the entire enclosure was wrapped with Oracal adhesive film.10%infil but can less, 0.4mm Electronics UsedPeristaltic pumps12V relaysESP32 microcontrollerStep-down (buck) converterUltrasonic sensor16×2 LCD displayRotary encoderPower switch and DC charging port12V batteryDigital voltmeterMost of the components were sourced from AliExpress. The total build cost was approximately 300 PLN (~70–75 USD). Prototype Notes & ImprovementsAs this is a prototype, some modifications w