Now the voltages are way better. On no pins i have measured anything over 3.3v. And the 3.3v pin measures a nice 3.29v
Then some things i don't know if they are okay:
- I have 3 IRL7833 mosfets. They are not connected to a GPIO right now, but i still tried to measure between those pins and ground. They measure -0.05v. Is that a problem? It's not much negative voltage, but i read somewhere that negative voltages are bad?
- The 5v line is still 4.5v. Even though, when i measure at the 5v step-down converter, the power is 4.98v. Could this be just because of the old Raspberry PI 1 B i'm testing this with? Or could there be another problem?
- I tried to measure current between Raspi 3.3v -> board 3.3v: With everything connected it measured 0.05 on the "200m" setting. Is that 0.05A? That's not too high right?
- Also i measured the power between 5v + on the 5v Step-down to the 5v pin on the usb connector. While booting it measured around 0.5-0.55 on "20m" . This dropped down to about 0.42 when booted. I have to note that not everything is connected at this point, so when in action, it could be more, but then again, this is measured with a RasPI B1, while i have a RasPI Zero ready to use, which should be more energy-efficient. So, the current ratings seem ok to me, right?
I'm just checking some stuff with you guys because i don't have enough experience myself to be really confident about all of this. Also, i don't wanna blow up another RasPI here... So better safe then sorry.