Universal Coral Board Case

Universal Coral Board Case

A clean, low-profile enclosure designed for the Synaptics CoralBoard™ SL. The case uses M3 threaded inserts and M3 screws for a solid, tool-friendly assembly. Multiple base plates let you adapt the same case to different mounting needs. Easiest way to print is load 3MF files, which are already correctly oriented and print the version you need.

Outer size: 78.2 × 63.2 × 16.7 mm.

Features

• Low-profile case with full access to ports

• Three base plate options:

  • Standard base

  • Camera / tripod mount (1/4"-20)

  • VESA 50×50 mm

• Optional covers for GPIO, Camera/mikroBUS, and battery connector

• Camera case version with a mount for a Raspberry Pi camera

• ALL IO easily accessible, including connectors, buttons and LEDs for easy debugging

• Multi-color lettering option (“With Coral intelligence”) for the lid

• Designed for M3×4–6 mm heat-set inserts + M3×6–12 mm screws

Customize the design
The full parametric model is available on Onshape. You can open it, adjust dimensions, cutouts, or create your own variants:

[Open in Onshape]

Hardware needed

• 4× M3 heat-set insert, M3 × 4–6 mm (case) – Prusa shop

• 4× M3 screw, 6–12 mm

• 1× ¼″-20 threaded insert (tripod base only) – Prusa shop

• 4× M4 heat-set insert, M4 × 4–6 mm (VESA base only) – Prusa shop

• 4× M4 screws to attach the VESA base to your monitor or arm (length depends on your mount)

• Camera case only: 4× M2 screw, 6–8 mm + 4× M2 nut

• Camera case only: Raspberry Pi Camera Module 3 (or v2, same 25 × 24 mm board and hole pattern)

• Camera case only: camera cable 22-pin 0.5 mm (board side) to 15-pin 1 mm (camera side), the kind sold for Raspberry Pi 5 / Zero 

Files included

The letters at the start of each file name match the designators in the assembly drawing (see “Drawing explanations” below). For example, a_b_case_clean_with_letters is part A (case) plus part B (letters) on drawing sheet 1. The best-quality drawings are in the included PDF, Drawing_Universal_Coral_Board_case.pdf.

Designators that never appear in a file name (C, D, F, H, J, P, Q, S, T, U, W) are the inserts, screws and the board itself. You buy those; you don't print them.

STEP files are split per part, so the covers K, L and M are separate STEP files and n_o_case_snap_in_with_letters.step contains only the case and its letters.

Assembly

1. Install the four M3 heat-set inserts into the case.

2. Move or remove the clear rubber feet under the board (see below).

3. Place the CoralBoard on the base plate.

4. Screw the case to the base plate from below.

5. Optional: press in the covers for GPIO, camera/mikroBUS or battery as needed.

Before assembly: the board's rubber feet

The CoralBoard SL ships with four clear rubber feet stuck to its underside. They are only there so the bare board can stand on a desk; inside the case they aren't needed.

The base plate has recesses for the feet. To keep the base plate printable without supports, two of the recesses (circled in red) don't line up with where the feet sit from the factory. Before you put the board in, peel those two feet off and either stick them back over the recesses or leave them off. Removing all four feet is fine too.

Print settings

Note: the easiest way to print is to open one of the 3MF files in PrusaSlicer and print the parts you need. They are already oriented.

• Layer height: 0.2 mm

• Perimeters: 2+

• Infill: 10–15 %

• Material: PLA or PETG

• Supports: none needed (optional)

• Orientation: case top face down (letters on the build plate), base plates flat, camera base standing

Multi-colour letters

The letters are a separate body inlaid in the top surface, one layer deep. With an MMU, AMS or toolchanger, assign the letters a second filament. On a single-nozzle printer, use the NO letters lid, or use your slicer's single-extruder multi-material mode with manual filament swaps on the first layer.

Drawing explanations

Overview of case + base plate options
Shows the main case, the three base plate variants (standard, camera/tripod, and VESA 50×50), and the hardware (M3 inserts + screws). This is the primary assembly overview.

• A – Case clean – print top face down (letters on the build plate)

• B – Letters for multi-colour print – optional

• C – M3 threaded inserts – M3 × 4–6 mm – 4×

• D – Synaptics CoralBoard™ SL

• E – Base plate clean – print flat on the bed

• F – M3 screws – M3 × 6–12 mm – 4×

• G – Base plate for camera stand – print standing, no supports

• H – Camera tripod thread insert – ¼″-20 – 1×

• I – Base plate VESA 50 × 50 mm – print flat on the bed

• J – M4 threaded inserts – M4 × 4–6 mm – 4×

Case with optional covers
Shows the case version with openings for GPIO, Camera/mikroBUS, and battery connector, plus the matching snap-on covers. Also notes that the camera and VESA base plates can be used with this configuration as well.

• K – GPIO cover – print flat on the bed

• L – Camera / mikroBUS cover – print flat on the bed

• M – Battery connector cover – print flat on the bed

• N – Case with IO openings – print flat on the bed

• O – Letters for multi-colour print – optional

• P – M3 threaded inserts – M3 × 4–6 mm – 4×

• Q – Synaptics CoralBoard™ SL

• R – Base plate clean (camera and VESA base plates fit too) – print flat on the bed

• S – M3 screws – M3 × 6–12 mm  – 4×

Camera case

Case V adds a mount for a Raspberry Pi camera, so the board and camera form one unit. Combine it with the tripod base plate (G) to use it as a smart camera on any tripod. The camera is fixed with 4× M2 screws and nuts, and the ribbon cable goes into the case through the opening under the mount.

1. Assemble the board in case V the same way as the other cases (inserts, base plate, M3 screws).

2. Connect the camera cable to the board's CSI connector before closing the case.

3. Screw the camera to the mount with the M2 screws and nuts, then plug in the cable.

The CoralBoard SL has a 22-pin 0.5 mm camera connector, while Raspberry Pi cameras use 15-pin 1 mm. You need a 22-to-15-pin cable like the ones sold for the Raspberry Pi 5 or Zero.

• T – M2 nuts – 4×

• U – Raspberry Pi Camera Module 3

• V – Case with camera mount – print top face down

• W – M2 screws – M2 × 6–8 mm, 4×

Case views and dimensions 

78.2 × 63.2 mm footprint; Ø4 × 6 mm holes for the M3 inserts.

The views show that all connectors, IO, buttons and LEDs remain fully accessible, so the board keeps complete functionality while inside the case.

Base plates 

Plain, camera stand (¼″-20) and VESA 50 × 50 (M4 inserts in Ø5.7 holes). All use 4× Ø3.2 through-holes with Ø6 × 3 mm counterbores for the M3 screw heads.