HardLabs

ZX Spectrum 48K

Bambelweeny57·zxspectrum_issue3b·src/issue3b.kicad_pcb

ZX Spectrum 48K PCB layout, top view — open source board by Bambelweeny57

About the ZX Spectrum 48K PCB

ZX Spectrum 48K is an open source PCB design by Bambelweeny57, published on GitHub. It is a 2-layer board measuring 213.1 × 129 mm, with 201 components from 79 distinct parts.

Other key parts include the ULA, Z80, LS157, ROM and 4116. By type, the board carries 74 resistors, 59 capacitors, 26 ICs, 14 diodes, 2 crystals and 2 connectors.

It belongs with the test & measurement designs in this gallery.

From the project

A faithful KiCad recreation of the Sinclair ZX Spectrum Issue 3B motherboard, reconstructed from original Gerber data and fully validated through multiple successful builds. This project preserves the 3B layout in an editable, open format and includes several companion PCBs desig

A faithful KiCad recreation of the Sinclair ZX Spectrum Issue 3B motherboard, reconstructed from original Gerber data and fully validated through multiple successful builds. This project preserves the 3B layout in an editable, open format and includes several companion PCBs designed to modernise, repair, or enhance the original Spectrum hardware.

The aim of this repository is to provide a clean, accurate, and reproducible version of the Issue 3B board for:

Main components on the ZX Spectrum 48K

ULAZ80LS157ROM4116LM18894532LS32LS00

ZX Spectrum 48K bill of materials (BOM)

201 components, 79 distinct parts.

QtyPartRefs
1
ULA
IC1
1
Z80
IC2
4
LS157
IC3, IC4, IC25, IC26
1
ROM
IC5
8
4116
IC6, IC7, IC8, IC9, IC10, IC11, IC12, IC13
1
LM1889
IC14
8
4532
IC15, IC16, IC17, IC18, IC19, IC20, IC21, IC22
1
LS32
IC23
1
LS00
IC24
1
14Mhz
X1
1
4.43Mhz
X2
1
Edge_Connector
E1
1
Barrel_Jack_MountingPin
J7
1
EAR1
EAR1
1
JROM
JROM1
1
Keyboard5
KB1
1
Keyboard8
KB2
1
Speaker
LS1
1
MIC1
MIC1
1
OKI
OKI1
Show 59 more
QtyPartRefs
1
OKI-H
OKI-H1
1
OKI-L
OKI-L1
1
L7805
REG1
1
Transformer_1P_1S
T1
1
TI
TI1
1
TI-3
TI-3
1
TI-4
TI-4
4
ZTX313
TR1, TR2, TR3, TR6
1
ZTX650
TR4
1
ZTX315
TR5
1
ZTX450
TR7
2
BC184
TR8, TR9
1
TV
TV1
11
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +3
1
1N4148
D13
1
BA157
D15
1
BZX85C5V1
D16
26
47nF
C1, C2, C3, C4, C5, C6, C7, C8 +18
1
22uF
C25
1
1uF
C27
5
22uF
C28, C34, C47, C50, C65
2
100nF
C31, C32
1
10nF
C35
2
33pF
C37, C38
1
10nF
C39
7
100nF
C43, C68, C69, C70, C71, C75, C77
2
100uF
C44, C45
1
1uF
C46
1
560pF
C49
2
150pF
C52, C53
1
470pF
C54
1
47pF
C63
2
100pF
C64, C67
2
16pF
C72, C73
1
4.7uF
C74
11
470
R1, R2, R3, R4, R5, R6, R7, R8 +3
8
8k2
R9, R10, R11, R12, R13, R14, R15, R16
8
330
R17, R18, R19, R20, R21, R22, R23, R57
11
1K
R24, R42, R45, R46, R47, R56, R58, R63 +3
1
180
R25
12
10K
R28, R29, R30, R49, R65, R66, R67, R68 +4
1
220K
R31
1
100
R32
1
680
R33
1
15
R34
1
10K
R35
1
680
R36
1
1K
R37
1
3K
R43
1
5K1
R44
3
2K2
R48, R51, R52
1
4K7
R50
1
390R
R53
1
100K
R54
1
56
R55
1
1K8
R59
1
68R
R60
3
15
R61, R62, R64
2
220
R70, R71

ZX Spectrum 48K design files

The KiCad project lives in the Bambelweeny57/zxspectrum_issue3b repository on GitHub; these links point at the commit this page was built from.

ZX Spectrum 48K: common questions

How big is the ZX Spectrum 48K PCB?

The ZX Spectrum 48K measures 213.1 × 129 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ZX Spectrum 48K?

201 components, from 79 distinct parts. The full bill of materials is listed on this page.

Where can I download the ZX Spectrum 48K design files?

From the Bambelweeny57/zxspectrum_issue3b repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ZX Spectrum 48K design in my own project?

The repository has no license, so all rights stay with Bambelweeny57. Use it as a reference, and ask the author before reusing the design.

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