HardLabs

ZX-Spectrum-48K-Issue-2

liveboxandy·ZX-Spectrum-48K-Issue-2

ZX-Spectrum-48K-Issue-2 PCB layout, top view — open source board by liveboxandy

About the ZX-Spectrum-48K-Issue-2 PCB

ZX-Spectrum-48K-Issue-2 is an open source PCB design by liveboxandy, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 213.1 × 130.1 mm, with 191 components from 70 distinct parts.

Other key parts include the ULA, Z80, 74LS157, ROM and 4116. By type, the board carries 73 resistors, 50 capacitors, 28 ICs, 15 diodes, 4 connectors and 2 crystals.

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

From the project

KiCAD created files for the ZX Spectrum 48K Issue 2 designed by Sinclair Research Ltd

This is a Kicad 10 project for an issue 2 16/48K ZX spectrum.

It was only done in order to produce an interactive bom (ibom.html) in the bom folder to aid in the debugging of faulty Speccies.

Although the gerbers appear to be correct to the original PCB I would not use them to get a PCB manufactured without a lot of checking.

It was created by overlaying pictures of a raw Issue 2 PCB, topside and bottomside and then creating the pcb layout from those and a readily available schematic.

ZX-Spectrum-48K-Issue-2, from the project README
From the project README

Main components on the ZX-Spectrum-48K-Issue-2

ULAZ8074LS157ROM4116LM1889453274LS3274LS00MODULATORL7805

ZX-Spectrum-48K-Issue-2 bill of materials (BOM)

191 components, 70 distinct parts.

QtyPartRefs
1
ULA
IC1
1
Z80
IC2
4
74LS157
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
74LS32
IC23
1
74LS00
IC24
1
MODULATOR
U1
1
L7805
U2
1
14MHz
X1
1
4.433619MHz
X2
1
MIC
J1
1
EAR
J2
1
EDGE CONNECTOR
J3
1
Barrel_Jack
J4
1
KB
KB1
1
KB
KB2
1
~
LNK1
Show 50 more
QtyPartRefs
1
~
LNK2
1
Speaker
LS1
1
COIL 13/39
T1
2
NS
TC1, TC2
3
ZTX313
TR1, TR2, TR3
1
ZTX650
TR4
1
ZTX213
TR5
2
2K2
VR1, VR2
4
Conn_01x02
Vid1, VidU1, VidV1, VidY1
13
1n4148
D1, D2, D3, D4, D5, D6, D7, D8 +5
1
BA157
D15
1
5V1
D16
27
47nF
C1, C2, C3, C4, C5, C6, C7, C8 +19
4
22uF
C25, C28, C47, C50
1
1uF
C27
3
100nF
C31, C32, C43
1
22uF
C34
2
10nF
C35, C39
2
33pF
C37, C38
2
100uF
C44, C45
1
1uF
C46
4
100pF
C52, C53, C64, C67
1
470pF
C54
1
47pF
C63
1
22uF
C65
9
470R
R1, R2, R3, R4, R5, R6, R7, R8 +1
9
8K2
R9, R10, R11, R12, R13, R14, R15, R16 +1
9
330R
R17, R18, R19, R20, R21, R22, R23, R32 +1
1
1K0
R24
1
180R
R25
3
680R
R26, R33, R36
8
10K
R28, R35, R65, R66, R67, R68, R69, R72
2
1K5
R29, R41
6
1K
R30, R37, R40, R42, R45, R46
1
220K
R31
1
15R
R34
2
3K3
R38, R39
1
3K 2%
R43
1
5K1 2%
R44
5
220R
R47, R56, R63, R70, R71
3
2K2
R48, R51, R52
1
4K7
R50
1
390R
R53
1
100K
R54
1
56R
R55
1
1K 2%
R58
1
1K8 2%
R59
1
270R
R60
3
15R
R61, R62, R64
1
1K0
R73

ZX-Spectrum-48K-Issue-2 design files

The KiCad project lives in the liveboxandy/ZX-Spectrum-48K-Issue-2 repository on GitHub; these links point at the commit this page was built from.

ZX-Spectrum-48K-Issue-2: common questions

How big is the ZX-Spectrum-48K-Issue-2 PCB?

The ZX-Spectrum-48K-Issue-2 measures 213.1 × 130.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ZX-Spectrum-48K-Issue-2?

191 components, from 70 distinct parts. The full bill of materials is listed on this page.

Where can I download the ZX-Spectrum-48K-Issue-2 design files?

From the liveboxandy/ZX-Spectrum-48K-Issue-2 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-Issue-2 design in my own project?

Yes, under the terms of its CC0-1.0 license, which liveboxandy chose for the repository.

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