Can someone answer these questions please:
I would like some infos about shields. For example with ethernet shield + touchscreen shield, how am I supposed to plug those, if they both need same pins? How arduino can route to the correct shield? I don't understand.
Also, on the "adapter shield" (the thing between the screen shield and the arduino), you see there are pins at the sides, I think I've read that they are unused: are they just used as supports for the weight?
What is the typical wire diameter that I must use? And what type of wire, eg for plugging into pins, do I need "full wire" or can I use a "wire with many fibers"? And can I use the same type of wire for plugging into pin and soldering?
I'm waiting for those answers so I can finally buy, without making a mistake (I hate wasting money). Sorry if I sound stupid, I'm beginner and french.