Where and how are you connecting your voltmeter? A photograph would be best to show us what you're doing.
No. A meter always needs TWO connections. One is on the 5V pin. Where is the other one?Steve
Hi,When my Arduino due is powered with 12V DC adapter, the 5V pin outputs 7.2V. I also tested some other voltage supplies, as shown below.DC supp -> 5V pin output12V -> 7.2V9V -> 7.2V7.5V -> 6.2V6V -> 5VI tested many boards and found that most of them is like that. However, there are actually several boards that output 5V no matter the supply voltages. When I powered them with USB cable, all the boards are normal (5V). Is there anyone has this situation? I do not believe that many of my boards are broken?!thanks.
The reason why I need 5V is to power an external DAC which needs exact 5 volt.
Some DMMs display a higher voltage if the battery goes flat.Do you have a low battery warning on the LCD?The Due uses a switching (buck) 5volt supply when on external power.Seems a bad idea to power a DAC from a potentially dirty supply.Make sure the DAC doesn't mind the 3.3volt logic.Leo..