Synaptics Coral Board SL Case optional fan, VESA / wall / desk mount

Modern two-part case for the Synaptics Coral Board SL (73 × 58 mm). Dark base, light cover, a crisp shadow gap all around – and not a single screw visible from the top.

HIGHLIGHTS

- Outer size 78.8 × 64.6 × 24.5 mm (39.5 mm tall with fan)

- Honeycomb grille in the lid – or classic slots / rings

- Optional 40×40×10 mm fan (5 V) with an air duct, blowing straight onto the heatsink

- All ports accessible: USB-C, USB-A, 2× JST-SH, microSD with finger recess, slots for camera and display ribbon cables

- Flex buttons: both push buttons are pressed through springy tongues in the front wall – no extra parts

- Light pipes for the three LEDs made from a piece of clear 1.75 mm filament

- Optional opening above the 2×10 pin header (GPIO version)

- One mounting system for everything: dovetail rail + locking screw

- Assembled entirely with M3 screws in heat-set inserts (ruthex M3×5.7)

- No supports needed, all STLs are already in print orientation

MOUNTS

- VESA 75 × 75 and 100 × 100 (behind your monitor)

- Wall – the same plate also works under a desk

- Desk stand, tilted 15°, with 45 mm clearance for the plugs

- Or simply flat on the desk with rubber feet

The case slides onto the rail from above, with the ports facing down. An M3×6 screw at the end of the rail locks it in place.

WHICH FILES DO I NEED?

One base + one lid + the mount(s) you want:

- bodenplatte.stl – base

- deckel_passiv.stl – honeycomb lid, no fan

- deckel_luefter.stl – lid for the 40 mm fan

- deckel_passiv_gpio.stl / deckel_luefter_gpio.stl – additionally open above the pin header

- deckel_passiv_schlitze.stl / deckel_luefter_ringe.stl – classic look instead of honeycomb

- halter_vesa.stl (VESA), halter_wand.stl (wall / under desk), halter_tisch.stl (desk stand)

HARDWARE

- Heat-set inserts ruthex M3×5.7 (GE-M3x57-001): 4, +4 for the fan, +1 per mount

- 4× M3×12 socket head (DIN 912) or button head (ISO 7380) – case

- 4× M3×14 – fan version only

- 1× M3×6 button head (ISO 7380) per mount – locking screw

- 4× rubber feet Ø 8 mm, max. 3 mm tall (e.g. 3M Bumpon SJ5302)

- Optional: 40×40×10 mm 5 V fan + heatsink approx. 14×14 mm, max. 6 mm tall

- A scrap of clear or natural 1.75 mm filament (light pipes)

- VESA: 4× M4×8 or M4×10 – wall: 2× 4 mm countersunk wood screws + wall plugs

ASSEMBLY

1. Install the heat-set inserts: 4 in the lid posts, 4 more in the fan posts if used, 1 at the end of each mount's rail. The holes are Ø 4.0 mm with a lead-in chamfer.

2. Peel off the four stick-on rubber bumpers under the board – two of them sit exactly where the standoffs are.

3. Place the board on the standoffs of the base.

4. Push pieces of filament into the lid as light pipes and trim them flush (approx. 11.5 mm, 26.5 mm for the fan lid).

5. Put the lid on and screw it down from below with 4× M3×12 through base and board into the lid posts – hand-tight only.

6. Stick the rubber feet into the recesses; they hide the screws.

Fan: install it with the label facing the board (so it blows down onto the heatsink) and fix it from below with 4× M3×14. Connect it to 5 V/GND. Whether the 2-pin connector next to the SoC is the fan header, please check the board's schematic.

PRINT SETTINGS

- Material: PETG, ABS, ASA recommended (PLA is fine for the passive version)

- 0.2 mm layer height, 4 perimeters (solid walls around the inserts), 20 % infill

- No supports. The lid is printed upside down (already oriented in the file).

- Bridges: max. 16 mm at the openings, 23 mm across the dovetail slot

- The honeycomb sits on the print bed – slow first layer, clean bed. A textured PEI sheet gives the top a nice finish.

- Looks best in two colours: base and mounts dark, lid light

PARAMETRIC

The model is fully parametric in Python/CadQuery (wall thickness, honeycomb size, rail clearance, stand tilt …). All parts were checked in CAD for collisions with the board's components. The rail has 0.3 mm clearance per side – adjust it in the source if your printer needs more or less.