Final prototypes

The PCBs for the final prototypes have arrived and been assembled, here are some picutres. Some footprints for parts need minor adjustment but otherwise this should be the final version. The circuit measures 21 mm in diameter and 2.5 mm at the thickest part (this will be reduced by 0.2 mm for the production version due to changing from 0.6 mm thick PCB to 0.4 mm thick).

Protoype size