Odroid C4 Modular Rack

A 3D-printable, stackable rack system for Odroid C4 single-board computers.

Features

• Modular design - Stack as many layers as you need (1 to 7+ boards)
• Tool-free assembly - Layers snap together via corner pegs; boards secured with printed friction plugs
• No hardware required - Entirely 3D-printed, no screws or fasteners needed
• Print-flat design - All parts print without supports
• Good ventilation - Integrated vent slots for airflow

Quick Start

1. Print the parts:

   • 1x bottom layer (stl/bottom_layer.stl)
   • N-1 middle layers (stl/middle_layer.stl) for N boards
   • 1x top cap (stl/top_layer.stl)
   • 4x friction plugs per board (stl/friction_plugs_x4.stl)

2. Assemble:

   • Stack layers by inserting corner pegs into sockets
   • Place boards on standoffs
   • Press friction plugs through board mounting holes into standoffs

Dimensions

Measurement	Value
Layer footprint	107mm x 78mm
Height per layer	33mm (assembled)
Board clearance	30mm vertical

Print Settings

• Layer height: 0.2mm
• Infill: 20-30%
• Supports: None required
• Material: PLA, PETG, or ABS

Files

See the stl/ directory for all printable files and detailed instructions.

File	Description
bottom_layer.stl	Base layer (1 per rack)
middle_layer.stl	Stackable middle layer (N-1 per rack)
top_layer.stl	Top cap (1 per rack)
friction_plugs_x4.stl	Board retention plugs (1 set per board)
friction_plugs_x28.stl	Bulk plugs for 7-board rack

Board Compatibility

Designed for the Odroid C4 (85mm x 56mm) with Raspberry Pi-compatible mounting hole pattern (58mm x 49mm spacing).

License

MIT License - see LICENSE for details.