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PiBM PS/2 Model 25
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Fully operational mini version of the IBM PS/2 Model 25 from 1989. Recreated using a Raspberry Pi 4B as the computer.
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Updated at source:
Model information
- Source
- Printables
- Category
- Computers
- License
- Creative Commons — Attribution — Share Alike
Detailed printing and assembly instructions on Instructables
- Update 1/3/2023.
- Alignment groove between pieces enlarged
- Display Front pieces realigned to face downward to bed. This requires a bit of support but keeps the front lip uniform with less need for putty/sanding.
- Update 1/19/2023
- Added Audio Jack connection PCB gerber file. This simplifies the audio wiring.
- Update 5/23/2023
- Add Audio Knob mounts which can harness a 6mm potentiometer, as well as an extended audio knob
Filaments used
Electronics and Hardware
Items with asterisks * have dimensions expected to fit
- 10.4 inch 1024x768 Brightness 500nits IPS LCD Screen *
- Ask seller for 50cm keyboard cable, the standard 30cm won't quite reach the rear panel
- MEISHILE 12V 10A 120W DC Switching Power supply *
- Raspberry Pi 4b *
- ...and storage card
- Icstation TPA3116D2 *
- Micro SD to SD Card Extension Cable Adapter *
- after three attempts with different models, this never operated as expected - too much electronics noise?
- Alternatively, use this Right Angle USB C Extension Cable with the alternate diskette mount.
- SWITCH ROCKER DPST 10A 125V *
- CONN JACK STEREO 3.5MM R/A *
- Speakers (2) *
- 64.3mm diameter speaker mounts - Dayton Audio DMA58-4 2" Driver
- 73.5mm diameter speaker mounts - Dayton Audio PC68-4 2-½" Driver
- Power Cord Inlet Socket *
- 3MM LED - Green
- 150ohm+ resistors for the LEDs
- Hook up wire
- Power Cable - 14 AWG
- Spade Terminals, Fork Terminals, Dupont Connectors
- Heat Shrink Tubing
- 60mm Fan
- Spring, 8mm diameter, 18 length
- USB C Type-C Male Plug Cable
- 5.5mm DC Pigtail
- 3.5mm Headphone Pigtail
- Micro HDMI to HDMI
- Prototype circuit board
- JST-XHP Connectors
- Threaded Inserts and Bolts
Finishing Supplies
- Super Glue
- Glazing & Spot Putty
- Sand Paper - 100, 400, 1000
- Primer
- Case Spray Paint
- Bezel Spray Paint
- Electronic Board Paint
- Acrylic Paint for Details
- Spray Lacquer
Tools
- 3D Printer
- I used a somewhat upgraded Ender 3 - it has OctoPrint/Raspberry Pi with camera, a PEI bed surface, dual gear extruder, and the 3D printer enclosure I had designed. However, a well tuned stock Ender 3 will be able to print all of the pieces just fine. (Unless the plastic extruder breaks!)
- Clamps for gluing, a bunch of them in various sizes
- Precision screw drivers and Hex screw drivers
- Precision tweezers
- Wire Stripper
- Cable crimper
- Terminal Crimper
- Soldering iron and solder
- Soldering stand/clamp
- Heat gun
Also, this angled fan duct can be used for airflow directed at the board.
Printing Notes - Make sure to have good bed adhesion and leveling, especially the larger pieces.
| Part | Finishing |
|---|---|
| Bezel Front Icons | Glue, Putty, Sand edges |
| Bezel PiBM Logo | Carefully trim any excess plastic, sand surrounding surface, paint dark grey and use white/silver stamp ink for the letters |
| Bezel Lower Right | Support needed for the LED mount and Icons |
| Case pieces | Support needed for lip and grooves on the edges. |
| Case Rear Panel Handle | Attach this with glue to the panel |
| Stand Leg | Print two of these, print/paint dark grey |
| Front Panel | Support required for diskette bay overhang. Block out threaded mount holes. |
| Diskette Mount | Requires support for the bolt holes, set to 54 degrees and no extra will be printed. Print in black. |
| Electronics Board | Support only needed for the larger slots, unless you're confident about bridging. Block out threaded mount holes and video control icons. Print/paint dark grey. |
| Extra Knob Mount | Print in black |
| 60mm Fan Cover | Print in black |
| Bezel Assembly | Glue, Putty, Sand surface smooth, Prime, Paint Grey-Brown |
| Case/Display Assembly | Glue, Putty, Sand surface smooth, Prime, Paint Antique White |
Inserts and Bolts
| Piece | Count | Inserts | Bolts |
|---|---|---|---|
| Bezel and display | 4 | M3×6mm | M3×8mm |
| LCD Panel and Bezel mount | 4 | M2×6mm | M2×6mm |
| LCD Control Board mount | 3 | M2×6mm | M2×6mm |
| Electronics Panel Mount | 1 | M3×6mm | M3×6mm |
| Diskette Bay Mount | 2 | M2×6mm | M2×6mm |
| Audio Board Mount | 2 | M2×4mm | M2×6mm |
| Extra Knob Mount | 1 | M2×6mm | M2×6mm |
| Power Switch Holder | 2 | M2×4mm | M2×6mm |
| Rasp Pi Mount | 4 | M2×6mm | M2×6mm |
| Buck Converter Mount | 2 | M2×6mm | M2×6mm |
| Power Socket Mount | 2 | M3×6mm | M3×8mm |
| Fan | 4 | use nuts | M3×12mm |
| Speakers | 8 | M3×6mm | M3×8mm |
| Rear Panel | 4 | M3×6mm | M3×6mm |
| Stand Leg | 2 | M3×6mm | M3×12mm |
| Power Supply Mount | 2 | M3×6mm | M3×6mm |
Raspberry Pi is a trademark of Raspberry Pi Ltd.
PERSONAL SYSTEM/2 (TM) is a trademark of IBM, August 4, 1987.