PCB layout update 1.2.1 Updated with OpAmp circuitry plus some component identification

Added first draft of Op-amp based circuitry Also some rationalisation of the components to avoid near-duplicates (e.g. 0.1uF 50V caps)

Continued merge of both branches Cleaned up PCB, extended 10mm to the right and pushed the power conversion stages to the right of the board. Left Resistive sensors out in the open as they will be changed, increased available real estate for resistive sensor

Reassigned Water T sense to CMOS only in SCH

1.1HW and Schematics -> PR - Updated all dates in title blocks - Added both FET based new power supply and protection circuits - completely winged the zones - Completed PCB layout, passes DRCs --> Needs review - Updated PCB metadata - Relocated 5th mounting hole a bit - Regenerated interactive BOM

PNP resistor sensing circuits Major updates : - PNP (BC807) based constant current supply-and-sense circuit for the passive resistor inputs Minor updates : - Added TODO for current consumption check on PNP-based circuits - Changed from French notation to British notation for resistance values

v1.0 - First PCB layout publication - Titled schematics - Added Revisions to Schematics and PCB - iBOM release - PDF export of PCB design

Restored Samacsys parts footprints PCB components are not placed, just dropped in place

Pre-PCB layout commit Footprints and special parts not included in Kicad project No PCB layout Netclasses not set up No code