In fact, I am not sure about this, I only have read it somewhere but I think I messed up. I think too that 200mA is way too much, but I can't know how to figure it out. I can only see that if i plug to the + button the 11 pin of the arduino, the display is messed up, and if I place to the + pole the 3.3V of the arduino, everything works just fine.