So during the second stream I soldered and tried to get the DC-DC Buck working, but no luck, I was getting strange voltages and it was all over the place, I'm still not 100% sure what went wrong, I will have to debug it a bit more.

However, after the stream I went ahead and soldered another board with minimum components, just the ones that were required to get the circuit going, then I started measuring and comparing to the reference designs and came to the conclusion that I might've missed some important components, mainly capacitors. I also put in different inductors I had laying around.

As things are right now, I have the second board working with voltage levels close to where they are supposed to be, however I double-checked my math and they should be more on point, so still something seems off, but I think it's good enough to test the rest of the board. 

This means that on the next stream we will solder up and try to bring up the samd51 chip with the uf2 bootloader and then CircuitPython.

Stay tuned!