Hi everybody, this is my first post on the Arduino forum! :)
I have a few conceptual questions about amperage and resistance for the Uno board. Warning, i'm a budding electrical engineering student, so I don't know everything there is to know about circuit boards and programming.
Will the Arduino Uno always output a current (i) of 20mA (0.02A) no matter what? I remember reading either on the fourm or in Getting Started with Arduino book that the current should be at 20mA. But will that current ever change? How will I know when it does? How do I change it? Why would I change it?
Also, I know that v = i *r or voltage equals amperage by resistance. I see that there are two pin slots for a 3.3V and 5.0V. Since these voltages are on my board does this mean the highest resistance i'll ever need no matter what circuit I build with my Uno is 165ohms and 250ohms, or the resistance that is just above those values?
I also see that the capacitors on my board say they're at 16v. Do I need to factor in these two capacitors when i'm designing a circuit? Is there a general way to go about doing that?
Thank you for answering my many questions!