2 layers46 × 90 mm
2 layers74.4 × 130.2 mm
ZX Interface 1 New Layout SMD PLCC Narrow
liveboxandy/ZX-Interface-1-Narrow-PLCCZX Interface 1 recreated with Standard Edge Connector, PLCC ROM with narrow width to not obscure Tape In/Out
- Size
- 74.4 × 130.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 80
- Nets
- 114
- Pads
- 398
- Tracks, vias
- 2,936, 226
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 28 Oct 2026
- Updated
- 28 Oct 2026
Overview
ZX Interface 1 New Layout SMD PLCC Narrow is an open-source printed circuit board by liveboxandy, from the liveboxandy/ZX-Interface-1-Narrow-PLCC repository on GitHub, published under the CC0-1.0 licence. It is a 2-layer board of 74.4 × 130.2 mm with 80 parts on 114 nets, routed with 2,936 tracks and 226 vias.
It is built around the 74LS27P-E, BC807-40 and BC850C, with the BZY55C4V3, MJ-3502N and SS2FH6-M3 among its other parts. Its parts include 41 resistors, 11 diodes, 9 transistors, 6 capacitors and 4 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
6
74LS27P-E
DIP-14-20℃~+75℃ 15ns@5V,15pF 2.7V 2V 3 3 400mV、500mV 74LS 800mV NOR Gate DIP-14 Logic Gates ROHSRenesas ElectronicsLogic Gates
BC807-40
SOT-23-65℃~+150℃ 1 PNP 100nA 250 250mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)BC850C
SOT-23-65℃~+150℃ 1 NPN 100MHz 100mA 15nA 250mW 450 45V 5V 90mV NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
BZY55C4V3
08050805 Zener Diodes ROHSTaiwan SemiconductorZener Diodes
MJ-3502N
插件,13.5x7.6mm-20℃~+85℃ 12V 1A Brass、Phosphor bronze Silver 插件,13.5x7.6mm Audio Connectors ROHSCUIAudio Connectors (Headphones)SS2FH6-M3
DO-219AB(SMF)-55℃~+175℃ 1 Independent 2A 3uA@60V 40A 60V 780mV@2A DO-219AB(SMF) Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
README
README.mdZX-Interface-1-Narrow-PLCC
Sinclair ZX Interface 1 recreated using a standard edge connector along with SMD components where possible along with a PLCC ROM. This design is narrower but longer so does not foul the Tape In/Out sockets but is now too long to be a prototype PCB with JLCPCB.
The schematic available from the Service Guide was redrawn in Kicad and used to create the PCB and to verify that the routing was correct and that no components were missed.
This is the result of that exercise.
Sometimes Kicad complains that there is an issue with the edge.cuts file. Running DRC will show what it doesn't like and it's easy to fix so that the board outline is a closed shape. Currently the pcb is just small enough for JLCPCB to treat it as a prototype for lower pricing.
The file bom/ibom.html is an interactive BOM that will show component position as well as routing in a web browser.
Have fun.
Comments - Good Bad or totally indifferent on https://www.facebook.com/groups/zxspa/
Parts
80| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 10K | Library:RESC3116X65N | R9, R21, R25, R26, R27, R33, R36, R37, R38, R39, R40, R41, R42, R43 |
| 7 | 1K0 | Library:RESC3216X60N | R1, R3, R5, R11, R14, R19, R31 |
| 6 | 1N4148 | Library:SODFL2512X90N | D3, D4, D5, D9, D10, D11 |
| 4 | 3K9 | Library:RESC3216X60N | R4, R6, R8, R16 |
| 4 | BC807-40 | Library:SOT95P230X110-3N | Q1, Q2, Q4, Q5 |
| 3 | 330R | Library:RESC3116X65N | R2, R22, R23 |
| 3 | 47uF 16V | Library:CAPPM7343X310N | C1, C2, C6 |
| 3 | 680R | Library:RESC3116X65N | R13, R18, R32 |
| 3 | BC850C | Library:BC850C215 | Q3, Q6, Q9 |
| 3 | BZY55C4V3 | Library:DIOC2012X85N | D6, D7, D8 |
| 2 | 12K | Library:RESC3216X60N | R12, R15 |
| 2 | 2K7 | Library:RESC3116X65N | R17, R20 |
| 2 | 330pF | Library:CAPC3317X75N | C7, C8 |
| 2 | 6K8 | Library:RESC3116X65N | R28, R29 |
| 2 | MJ-3502N | Library:MJ3502N | SK2, SK3 |
| 2 | SS2FH6 | Library:SODFL3718X108N | D1, D2 |
| 2 | SST3904 | Library:SOT95P240X120-3N | Q10, Q11 |
| 1 | 22uH 0.41A | Library:LQH2MCN100K02L | L1 |
| 1 | 270R | Library:RESC3216X60N | R30 |
| 1 | 2K2 | Library:RESC3216X60N | R10 |
| 1 | 47R | Library:RCC1206_e3 | R7 |
| 1 | 47nF | Library:C1206 | C5 |
| 1 | 4K7 | Library:RESC3116X65N | R24 |
| 1 | 74LS27 | Library:SOIC127P600X175-14N | U3 |
| 1 | 8Mhz | Library:830202129201 | X1 |
| 1 | DE9_Receptacle | Library:DSUB-9_Female_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset7.48mm | SK1 |
| 1 | LA15-302 | Library:DIP-40_W15.24mm | U1 |
| 1 | Microdrive | Library:ZX_MD_Edge_Connector | SK4 |
| 1 | SN74HCU04DR | Library:SOIC127P600X175-14N | U4 |
| 1 | SST39SF040 | Library:MC32PLCC | U2 |
| 1 | SW_DIP_x05 | Library:A6FR5104 | SW1 |
| 1 | ZX Expansion | Library:ZX_Expansion_BUS_Edge_Connector | SK6 |
| 1 | ZX Spectrum | Library:ZX_Spectrum_BUS_Edge_Connector | SK5 |
Similar boards
- 2 layers100.3 × 55.2 mm
- 4 layers40 × 80 mm
- 2 layers29.4 × 110 mm
- 4 layers223 × 226 mm
Apple PCB 820-0086-C
RichCini/MacRedux
Redraws/reimplementations of various legacy Macintosh boards.
186 parts4 - 2 layers100 × 100 mm
- 2 layers77 × 100 mm
- 4 layers
IONPAK2
m-labs/ionpak
A modern, low-cost universal controller for hot-cathode ionization vacuum gauges. (WIP)
259 parts23
Questions
How big is the ZX Interface 1 New Layout SMD PLCC Narrow PCB?
It measures 74.4 × 130.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ZX Interface 1 New Layout SMD PLCC Narrow use?
80 parts, built around the 74LS27P-E, BC807-40, BC850C and BZY55C4V3. 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 ZX Interface 1 New Layout SMD PLCC Narrow KiCad files?
From the liveboxandy/ZX-Interface-1-Narrow-PLCC repository on GitHub, at the commit this page was made from: the board is ZX Interface 1 New Layout SMD PLCC Narrow.kicad_pcb and its schematic Microdrive_IO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ZX Interface 1 New Layout SMD PLCC Narrow design in my own project?
Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).