Preboxi "The hobbyists think about what could be the cheapest and simplest solution. Then they build something at the highest cost and complexity." We have found the simple and practical hobby solutions, which is the Preboxi. Preboxi is a box family developed for fixing Arduino and other electronic panels, quick prototyping, demonstration, small series assembly, and education. The stability of the box is provided by high-quality anodized aluminum profile, which is connected to the industrial plastic front and side panels with a black micro-grooved surface. The Arduino or Arduino clone components can be safely fixed inside the box, and wiring and programming tasks can be performed after fixing. One of the advantages of the assembly box is the 3x15 pin communication connector location on both sides. With its help, power transmission and data communication can be established with adjacent boxes. Preboxi boxes with the same type can establish contact with each other through these communication options, and thus a complex system can be built by placing multiple boxes next to each other. The placement and fixation of the boxes can be ensured with the nut-sliding screws that can be ordered separately. With the fixing elements, an unlimited number of instrument boxes can be connected to each other. CP and CX boxes with support feet can be assembled in a tilted position of 33 and 45 degrees. With the help of the Preboxi box, the completed prototype can be easily transported, demonstrated in a visually appealing way, and quickly modified. Preboxi prototyping boxes can create impressive presentations for customers and potential clients. With the purchase of the product, it can make your work easier for decades.