So I got this DC-DC converter which is a switch-mode converter. Those are pretty efficient, so hopefully I won’t have heat problems. It is adjustable with a little screw, so I tried connecting a 9 V battery to it and measuring the output voltage with a multimeter. I adjusted it to 5 V. I wonder if it will also output 5 V if I input another voltage than 9 V, but I didn’t test that yet.
The idea was to power my RPi from this, with 11.1 volts from the LiPo battery converted to 5 V for the RPi.
I am very excited, because I have a electrodynamics course this semester. It will be great finally to learn about this subject as I think it is essential knowledge to have. At least for me.