Thanks, I installed KiCad and had a go squeezing it all in to 10mm and it seems to fit surprisingly well! I was expecting to have to stack the 7135 on top of the FET, and then put the +battery contact on top of that but it wasn’t necessary. I ended up putting the power section side towards the LED, and the MCU etc towards the battery. There’s one version with the attiny13a and one with the attiny1616.
I’ve never designed a PCB before so I’m sure it could be done a lot better but it was fun to have a go.
I fear that’s the easy part though, and the porting will involve more research. I’ll have a look at the datasheets and see if I can make any headway, though I’ve never ported anything either so we’ll see how it goes!
