Layout : Adjusted fixation holes position for round spacing and coherent spacing between the two boards.

Added M4 mounting holes.

Added image of the schematic of the legacy circuit.
Layout : created board edge, placed components.

Created symbol and footprint for the legacy 7-segment display.

Schematic : added 1M pull-up resistor on analog temperature input for sensor disconnection protection.

Schematic : corrected Arduino reset on encoder push button, added signal on the inter-board connector.

Schematic : added Arduino reset on encoder push button (modification on equipped board on original project).

Schematic : Added pull-down resistors on MOSFETs grids (modification on equipped board on the original project).