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Back at my CO2 sensor project (an open-hardware Aranet 4 clone) this week! I finally made a PCB design – it's my first "complicated" design ever, so I feel very clumsy!

Changes I still wanna make:

- Flood the top layer with a ground fill, as well?
- Add mounting holes.
- Confirm correct placement of all parts in JLCPCB.
- Add a cutout to allow the e-ink screen to be connected from the other side.

If you have tips what mistakes to look out for at this stage, I'd be thankful!