1/ This is a control panel dimming circuit for a high vibration environment.

2/ This is a noisy 12-14 volt system.

3/ There are multiple computerised instruments.  These have a high impedance input that senses voltage between 0 and VBATT to set screen brightness (from 0% to 100% respectively).

4/ There are also some warning LEDS.  These are 12V leds that are switched on/off (including flashing) by an external instrument (open collector to ground).  The aim is to have these reduce brightness at night (when the panel brightness is set to low).  The secondary aim is to isolate them, so that one flashing does not cause the other to dim, and most importantly, does not cause the computerised instruments to dim.

5/ SW1 RV2, and RV3 exist to provide flexibility so we can configure in the field.

6/ RV1 is the actual user control.  This will be a Conductive Plastic pot for a smooth feel.

7/ RV1 will be screwed onto the control panel from the rear and will support the board, so it should be mounted centrally, and otherwise, the board should be as compact as possible.  Single and double sided are both acceptable.  This should be SMD.

8/ You are welcome to propose changes that could make the circuit more robust.

9/ I will need schematic, pcb layout, drill files, and anything else that I would require to have JLPCB assemble this for me.

10/ The connectors J1 and J2 should be spring loaded suitable for high vibration, and should be mounted on the rear of the board.

11/ Silkscreening labels for those connectors should be:

J2:
 1 PWR
 2 GND
 3 TO_PANEL
 4 TO_CGR_WARN
 5 TO_CGR_CTN

J1:
 1 WARN_LED+
 2 WARN_LED-
 3 CTN_LED+
 4 CTN_LED-

All other components can be silkscreen with their ID and value if this fits.

General design notes:
* R1/C1/C2/C3 are just power filtering - you can modify these values if appropriate.
* D5 - was just to prevent the filter feeding back into the ship's power.
* RV1 - Smooth feel is important as it robust, so I want this to be Conductive Plastic and a "D" flat-sided shaft.
* RV2/3 - Should be 10-turn cermet trimmers.
* D1/4 - values have been selected to provide a range of thresholds that are above the zener soft region.


I need:
* Design critique if needed.
* A tidied schematic.
* Files suitable for JLPCB (art/drill/bom).
* My preference is KiCad files.