DIY Rack¶

Overview of the lab's DIY rack consisting of:

Stackable plastic drawers
Multiple 3D printed parts (ventilation ducts and cases for devices) - CAD sources here
AC control box interface for control of devices via SSR relays - electrical schematics can be found in here.

Rack photos¶

Tower rack with plastic drawers and cabling

Bench test setup with routers and relays

Two rack levels open with PSU and wiring

AC Control box¶

Separate box from the rack: relays/SSR, UTP (signals) and 230 V to cooler and PSU. Detailed wiring schematics here.

Thermal considerations and ventilation¶

With vertical stacking, hot air from lower levels rises and tends to stagnate at the top, risking overheating of upper equipment. Mitigation is a bottom fan (120 mm, 220 V) pushing cold air upward and printed ducts guiding flow toward the drawers. Fan datasheet: Hardware catalog - Bosser 120 mm.

3D printed parts¶

Renders and photos of parts used for ducts, bases, and accessories. Models aim for support-free printing where applicable (printer used was a Creality Ender 3 Pro).

Qty	STL file	Use
1	`curved_intake_duct.stl`	Curved duct: 120 mm fan to chimney
4	`airflow_chimney_duct_3levels.stl`	Vertical segments with grilles (3 levels each)
1	`airflow_chimney_duct_2levels.stl`	Segment with 2 levels
1	`chimney_duct_cover.stl`	Chimney top cover
3	`belkin_rt3200_base.stl`	Compact Belkin RT3200 base
1	`CE3PRO_librerouter_rack.stl`	Open LibreRouter enclosure (vented base, standoffs)
1	`NanoHolderA.stl`	Arduino Nano holder
1	(aux.) `drawer_stop`	Drawer guide / stop (visual asset; filename per `3d_parts/`)
1	`logo fcefyn.stl`, `logo unc.stl`	Decorative logos

The Belkin base was adapted from RT3200/E8450 Wall Mount Case (TuxInvader): base only, open top for ventilation.