Also, this is the PCB - approximative - that I used in the tests. Some of the components were replaced by another value and some were strapped with a wire.
Also the FR107 diode was installed over the 22K resistor.
The 3 non plated holes are for ventilation of the 7812 heat sink and for ventilation of the power resistor.
Also, R16 was removed.
The components with reference designator formed by one letter (R,C) and 1 or 2 digits (1, 10) are corresponding with the components from the LTSPice schematic.