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Robotic Bartender - Arduino Based
This is a bit late, but if it helps, I didn't use valves as one of the key aspects of this project was to do it as cheaply as possible. They also add unnecessary complexity. You could use a single pump with multiple valves and have the tubes tie into a manifold, but not with peristaltic pumps. They're very slow on their own and you'd have to draw all of the ingredients equally which would prevent you from having a drink selection. What you could do is get an air vacuum/compressor pump to pressurize the bottles then have tubes with valves to control the flow of the ingredients. I started another, larger bartender like this. It is much harder to control the flow precisely this way, however, as they're aren't any affordable flow meters for such small flow rates and the Arduino only has so many pins. What I was doing was recording the pressure from the pump and calculating the flow rate given the pressure, but with the tubes and valves I was using being so small, all the equations in my textbooks went out the window. I'll probably just do a line/curve of best fit from experimental data if I ever pick up that project again. With the Raspberry Pi Zero being so cheap now, might be better to go with a Pi based project.
Can you do this using a single pump and multiple valves and having the tubes all connect at a common point?
Could you use a single pump with multiple valves and have all the tubes coming form the bottles connect to a single common point? Also you only used pumps right? How come not pumps AN valves? Great job by the way i'm looking to do something similar.
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