I did a measurement with a cheap digital volt meter and it came around 2.5V. I think I should invest in a better multimeter in the first place (a buddy of mine has an industrial fluke that works really well he said, maybe I should look for something like that) to get some accurate readings
You're absolutely right with the statement you made. However I think a good meter will be a good investment though(for my study and other projects in the near future) even if it isnt really meaningful for these kinds of projects yet.
We just got my son a $19 extech meter, sprung for a little extra because this one also came with a thermocouple probe.
We got him a $119 Weller soldering station too, so I think he'll behave. Off to college in the fall...