Just a small hardware project: I am building a cocktail mixer in an old PC case. I saw something similar at a con over Easter and had to build one myself, it had a tap coming out of the 3.5" bay and the ingredients were inside the pc case. It uses peristaltic pumps to move the different ingredients to the cup. It is very simple, but still took a couple of days to complete. In detail it consists of 6 x peristaltic pumps, 3 x L298N motor driver, 3 x PCF8574 io expander and an esp32. The software for the esp32 is very dumb and I actually coded it correctly before I had all the parts, it just enables and sets the speed for the motors and is attached via USB to a laptop. There a webapp is used to manage ingredients and recipes.