First Project

Projects General Guidance
5

With "plug the SD card to the 5V" i understand what you now meant.

  1. The arduino Uno has 2 5V Power Output
  2. If the Intensity of the devices you want to connect to the 5V pin is not higher than 40 mA, connect many cable to the 5V pin.
  3. You can always turn any other pin to a 5V power output. Just use
digitalWrite(digitalPin, HIGH);