A simple, easy and cheap to make scale frontend (ADC + LDO + RC filter) compatible with Adafruit Feather form factor ecosystem.
Just print, solder the components of the (smallish) BOM and select any CPU (see compatibility list). https://gitlab.com/jousis/scale-featherwing
You can stack it with many other FeatherWings to create strange but powerfull combinations (again, see compatibility).
If you need something more sophisticated see: https://hackaday.io/project/164256-espresso-scale