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Arduino

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  • It's an Arduino Nano, so no barrel jack.
    – Mads Skjern
    Commented Oct 4, 2014 at 20:41
  • 1
    where and when were you getting those voltages? It could be a drop from measuring with and without other current flowing from USB (if you measured initially without the arduino). There should be a small drop as the USB input power does go across a fuse (F1 on schematic) and a mosfet (T1) before reaching the 5v pin.
    – BrettFolkins
    Commented Oct 4, 2014 at 21:03
  • 1
    I put the Nano in a breadboard. And I measure the voltages with a multimeter, which I put in the breadboard right next to the pins from the Arduino. I understand that there can be a voltage drop when there is a load, ie when there is a current. But there is no other load in my setup, than what is inside the Arduino itself.
    – Mads Skjern
    Commented Oct 4, 2014 at 21:39
  • 1
    I measure the 5.07V, by putting the multimeter on the points where the USB connector is soldered to the Arduino.
    – Mads Skjern
    Commented Oct 4, 2014 at 21:41
  • 4
    There is Feeding power to Arduino: the ultimate guide
    – jediz
    Commented Jan 4, 2017 at 9:09