2 layers40 × 30 mm
2 layers25.7 × 53.1 mm
Master Compact FDC Interface
BrettHallen/BBC_MicrosProjects for the BBC Model A/B and Master
- Size
- 25.7 × 53.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 3
- Nets
- 19
- Pads
- 61
- Tracks, vias
- 100, 11
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 16 Nov 2024
- Updated
- 15 Feb 2025
Overview
Master Compact FDC Interface is an open-source printed circuit board by BrettHallen, from the BrettHallen/BBC_Micros repository on GitHub. It is a 2-layer board of 25.7 × 53.1 mm with 3 parts on 19 nets, routed with 100 tracks and 11 vias.
It belongs with the interfaces and adapters boards of this library.
README
README.mdBBC Micros
Projects for the BBC Model A/B and Master.
Master Compact Floppy Interface
Simple adaptor board to convert the DB25 floppy interface to a standard IDC 34-way header.
Status: TESTED
- 17-Nov-2024: test PCBs ordered from PCBWAY
- 20-Nov-2024: PCBs shipped
- 27-Nov-2024: PCBs arrived
- 3-Dec-2024: tested successfully
DB25 34-IDC
2 1
/INUSE 4--3
6 5
1---INDEX-----8 7
14 2---/DS0-----10 9
15 3---/DS1-----12 11
16 4---/DS2-----14 13
17 5---/MOTOR---16 15
18 6---/DIR-----18 17
19 7---/SEEK----20 19
20 8---/DATA----22 21
21 9---/ENABLE--24 23
22 10---/TRK0----26 25
23 11---/WRPROT--28 27
24 12---/READ----30 29
25 13---/SIDE----32 31
34 33
Pins 14-25 on DB25 connected to GND.
Odd pins on IDC connected to GND.
The Master Compact's original floppy cable has IDC pins 3 & 4 connected,
i.e. /INUSE grounded. This doesn't seem to matter when using the Gotek.
Parts
3| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | BBC | Connector_Dsub:DSUB-25_Male_EdgeMount_P2.77mm | J1 |
| 1 | Gotek | Connector_PinHeader_2.54mm:PinHeader_2x17_P2.54mm_Vertical | J2 |
| 1 | ~{INUSE} | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
Questions
How big is the Master Compact FDC Interface PCB?
It measures 25.7 × 53.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Master Compact FDC Interface use?
3 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Master Compact FDC Interface KiCad files?
From the BrettHallen/BBC_Micros repository on GitHub, at the commit this page was made from: the board is Master_Compact_FDC_Interface/Master_Compact_FDC_Interface.kicad_pcb and its schematic Master_Compact_FDC_Interface/Master_Compact_FDC_Interface.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Master Compact FDC Interface design in my own project?
Its repository states no licence, so its author keeps all rights: ask BrettHallen before reusing the design.
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