HardLabs

Max48 ISSUE4

alvaroalea·all-spectrum-clones

Max48 ISSUE4 PCB layout, top view — open source board by alvaroalea

About the Max48 ISSUE4 PCB

Max48 ISSUE4 is an open source PCB design by alvaroalea, published on GitHub. It is a 2-layer board measuring 213 × 130 mm, with 186 components from 93 distinct parts.

Other key parts include the Z80CPU, L7805, 27128, 62256 and 74HC04. By type, the board carries 70 resistors, 40 switches, 32 capacitors, 14 connectors, 13 transistors and 9 ICs.

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

From the project

Schematic of a 8bit computer, clone of Sinclair ZX Spectrum

La idea es que a base de borrar trozos de circuito que no interese, generemos nuestro propio clon personalizado con las siguientes opciones:

ULA - Elegir entre ALTERA o XILING MEMORIA RAM- 48 o 128K de RAM MEMORIA ROM- 16K o 64K ROM, opciones de ROM mayores con seleccion por dip-switches SONIDO - PSG (AY-3-8912 o YM2114), MONO O ABC, OPCION puertos SERIE, AUX CINTA - conectores 48K o +3, circuiteria tipo Arlequin o tipo Humble VIDEO - RGB o Composite, circuiteria tipo Arlequin JOYSTICK - SJS o ATARI, normas SINCLAIR o KEMPSTON TECLADO - integrado de 40 Teclas, por transistores (arlequin) o…

Max48 ISSUE4, from the project README
From the project README

Main components on the Max48 ISSUE4

Z80CPUL7805271286225674HC04EPM7128S_LCCTL712AD725

Max48 ISSUE4 bill of materials (BOM)

186 components, 93 distinct parts.

QtyPartRefs
1
Z80CPU
U1
1
L7805
U2
1
27128
U3
2
62256
U4, U5
1
74HC04
U6
1
EPM7128S_LCC
U7
1
TL712
U8
1
AD725
U9
8
BC557
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8
5
BC548
Q9, Q10, Q11, Q12, Q13
1
14.000Mhz
Y1
1
3.58Mhz
Y2
1
4.433Mhz
Y3
1
Conn_01x05
J1
1
Conn_01x08
J2
1
ZX_Spectrum_Connector_plus3_SORTED
J3
1
Jack-DC
J4
1
EAR
J5
1
MIC
J6
1
VIDEO
J7
Show 73 more
QtyPartRefs
1
RESET
J8
4
Conn_01x03
J9, J11, J13, J14
1
JTAG
J10
1
Mini-DIN-8
J12
1
Speaker
LS1
1
KEY_1
SW1
1
KEY_2
SW2
1
KEY_3
SW3
1
KEY_4
SW4
1
KEY_5
SW5
1
KEY_6
SW6
1
KEY_7
SW7
1
KEY_8
SW8
1
KEY_9
SW9
1
KEY_10
SW10
1
KEY_Q
SW11
1
KEY_W
SW12
1
KEY_E
SW13
1
KEY_R
SW14
1
KEY_T
SW15
1
KEY_Y
SW16
1
KEY_U
SW17
1
KEY_I
SW18
1
KEY_O
SW19
1
KEY_P
SW20
1
KEY_A
SW21
1
KEY_S
SW22
1
KEY_D
SW23
1
KEY_F
SW24
1
KEY_G
SW25
1
KEY_H
SW26
1
KEY_J
SW27
1
KEY_K
SW28
1
KEY_L
SW29
1
KEY_ENTER
SW30
1
KEY_SHIFT
SW31
1
KEY_Z
SW32
1
KEY_X
SW33
1
KEY_C
SW34
1
KEY_V
SW35
1
KEY_B
SW36
1
KEY_N
SW37
1
KEY_M
SW38
1
KEY_SYMB
SW39
1
KEY_SPACE
SW40
1
D_Bridge_+-AA
D1
1
1N4148
D2
1
1N4047a
D3
1
1N4742a
D4
1
CP
C1
1
680u
C2
23
100n
C3, C4, C5, C6, C8, C9, C10, C11 +15
2
220u
C7, C29
2
1n
C14, C16
1
3.3n
C18
1
10p
C24
1
10u
C27
6
10K
R1, R2, R3, R4, R34, R63
1
22K
R5
31
470
R6, R7, R8, R9, R10, R11, R12, R13 +23
3
12K
R33, R37, R39
1
33K
R36
1
100K
R38
1
4M7
R43
2
18K
R44, R45
3
3K9
R46, R48, R51
6
68
R47, R50, R52, R59, R60, R64
5
75
R49, R56, R57, R58, R67
3
2K2
R53, R54, R55
3
270
R61, R65, R66
1
150
R62
2
R_Network08
RN1, RN3
1
R_Network05
RN2

Max48 ISSUE4 design files

The KiCad project lives in the alvaroalea/all-spectrum-clones repository on GitHub; these links point at the commit this page was built from.

Max48 ISSUE4: common questions

How big is the Max48 ISSUE4 PCB?

The Max48 ISSUE4 measures 213 × 130 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Max48 ISSUE4?

186 components, from 93 distinct parts. The full bill of materials is listed on this page.

Where can I download the Max48 ISSUE4 design files?

From the alvaroalea/all-spectrum-clones repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Max48 ISSUE4 design in my own project?

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

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