Can I get a patent for a device which was made with open source parts? I have some concept of a device but it's made with Arduino and other (Arduino-friendly) components. Is it possible to pass all appropriate steps to get a patent?
Whether or not you use open source parts is really irrelevant. What matters is whether your invention is useful, novel and non-obvious. Useful means it has fulfills a purpose. Novel means it hasn't been thought of before. Non-obvious means someone skilled in the field wouldn't think it straightforward. This is a brief explanation, there are more rigorous legal definitions.