Greaseweazle Blue Pill Direct 3.5" Floppy Case v2 (Compact)

A compact two-part enclosure for the Greaseweazle "Blue Pill Direct" build – a 3.5" floppy drive wired straight to an STM32 Blue Pill with only 14 Dupont jumper wires, no adapter PCB, no ribbon cable. See https://github.com/keirf/greaseweazle/wiki/Blue-Pill-Direct

Features
- The drive is held by four screws from below. Its front bezel sits flush in the front opening, sized exactly to the bezel. The front of the lid rests right on the drive, so the bezel is held firmly and doesn't move.
- The lid is held by six self-tapping screws from below.
- The Blue Pill stands on its long edge in grooves in the bottom and the lid. There is about 20 mm of space behind the drive for the wiring.
- The USB cable exits at the back through a 3.5 mm hole split between the halves: you lay the cable in, no need to push the plug through. It is slightly clamped.
- Vent slots along the rear top edge.

Will it fit your drive?
Made for a standard 3.5" drive (I use an ALPS DF354H):
- Drive and bezel: 101.6 mm wide, 25.4 mm high.
- Bottom mounting holes: M3, about 94 mm apart side to side and 70 mm front to back, the front pair 35 mm from the front of the bezel.
- Screw heads up to 1.8 mm high (the usual PC drive screws).

You need
- 3.5" floppy drive
- STM32 "Blue Pill" board (53 × 22.9 mm)
- 14 Dupont jumper wires
- Micro-USB cable about 3.5 mm thick
- 4 × standard PC drive screws (M3, head up to 1.8 mm)
- 6 × M3×16 self-tapping screws to join the halves (the posts are made for self-tapping screws, not for heat-set inserts)

Printing
- Bottom prints as is. The lid is already flipped (ceiling on the bed).
- Supports are needed only for the bottom part, inside the recesses for the screw heads on its underside. They pop out easily: push a screwdriver through the screw hole from the inside. The lid needs no supports.
- Printed in PETG with 30% infill.

Assembly
Before you start, bend the BOOT jumper pins on the Blue Pill to the side so they lie flat, parallel to the board – there is only 6.4 mm behind the board.
Drive into the bottom part, bezel flush with the front → 4 screws from below → board into the bottom groove → wiring → USB cable into the notch at the back → lid on → 6 self-tapping screws from below.

Credits and license
Remix of my "Greaseweazle Blue Pill Direct 3.5" Floppy Case" (https://www.thingiverse.com/thing:7419025, CC BY-NC-SA 4.0), which is a remix of "Greaseweazle R1 Case" by krug3r (https://www.thingiverse.com/thing:6193592, CC BY 4.0), which is a remix of "Greaseweazle V4 Slim Case" by astuermer (https://www.thingiverse.com/thing:5522437, CC BY-NC 4.0), itself based on "Case for Greaseweazle F7 Lightning Plus and 3.5" floppy drive" by n13ldo (https://www.thingiverse.com/thing:4920473, CC BY 4.0) and "Greaseweazle v4 Slimline Case" by Tom_DD (https://www.thingiverse.com/thing:4958106, CC BY 4.0). Rebuilt from scratch in OpenSCAD – the layout and key measurements follow v1, the geometry is new.
This remix is licensed under CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/) — non-commercial use only (inherited from the V4 Slim Case) and derivatives must be shared under the same license.

How it was made
This model was designed together with AI – Claude Opus 5.5 by Anthropic. The ideas, measurements and design decisions are all mine; Claude turned them into OpenSCAD code, and we went back and forth many times, refining and double-checking every detail along the way.
I exported the STL files myself, straight from that code in OpenSCAD – so there's no AI-generated mesh here, just plain, readable code turned into geometry. What you print is exactly what the code describes, nothing more.