Hi all,
I have a project in mind that involves compressing air (using electric pumps) and storing it in a tank. This process will be regulated by an arduino. For this project I will need these two parts; an air compressor, and a pressure sensor. For the tank I'm just going to use a plastic bottle or such.
After some looking around I didn't find much options regarding the pressure sensor. Same goes for the compressor. At the moment I'm thinking of using a compressor made from Lego pieces (the project is Lego based), but the downsides of that is price and performance.
The pressure of the tank will be 3 bar max.
Please any advice on feasibility and parts is greatly appreciated 
Try Google on Arduino + preasure sensor.
Railroader:
Try Google on Arduino + preasure sensor.
Yeah and that gives you low pressure sensors (for drones and stuff) I need sensor that can handle at least 3 bar.
Using Google I found a 3bar pump at $50, sensor starting at $10, and valves up from $25.
DrDiettrich:
Using Google I found a 3bar pump at $50, sensor starting at $10, and valves up from $25.
Can you please share your findings? I've found a few candidate sensors; but I have no knowledge/experience with this sort of sensor. In other words I don't know how to choose between the sensors.
Sorry, I also have no special experience with pneumatics and with your project.
DrDiettrich:
Sorry, I also have no special experience with pneumatics and with your project.
That's fine. Can you please share with me the results of your search? (Pump, sensor, and valves) Cheers!
From Googling 3 bar pressure sensor arduino: 3 bar pressure sensor arduino - Google Search
From Googling 3 bar air compressor arduino: 3 bar air compressor arduino - Google Search
There's even a YouTube link to a system made with Lego.
3 bar is about 45 psi.
That is automobile tire pressure. Range
Should be lots of sensors and pumps
Available
Automobile parts often are approved, robust and consequently expensive. The minimal requirements depend on the purpose of the project.
DrDiettrich:
Automobile parts often are approved, robust and consequently expensive. The minimal requirements depend on the purpose of the project.
It's just a toy remote control rover type thing. I will be using the compressor and air tank to provide air for the Lego pneumatic system to work. So I guess the parts can be crude; and as long as they do the job it's fine.
I found suitable air pressure sensors; but I'm unable to find a solution for a 3 bar air pump other than making one out of Lego (but I want to keep that as my last resort as it is expensive).