HardLabs

SBC4040

ryomuk·SBC4040·hardware/rev1.1/SBC4040.kicad_pcb

SBC4040 PCB layout, top view — open source board by ryomuk

About the SBC4040 PCB

SBC4040 is an open source PCB design by ryomuk, published on GitHub under the MIT license. It is a 2-layer board measuring 190.5 × 127 mm, with 145 components from 54 distinct parts.

Other key parts include the 74HCT00, 4081, 74HC14, 4093B and 4040_CPU. By type, the board carries 48 resistors, 38 diodes, 26 capacitors, 22 ICs, 6 connectors and 4 switches.

It belongs with the retro computing designs in this gallery.

From the project

Single Board Computer using Intel 4040

This document is written mostly in Japanese. If necessary, please use a translation service such as DeepL (I recommend this) or Google.

- ROM領域が4KBから8KBに増加 - サブルーチンコールが3段から7段に増加 - PMR命令により，プログラム領域のRAMを直接読めるようになったはず(未確認) - 割り込み機能 - ステップ実行は使い道が無さそうなので端子だけ出して未実装

SBC4040, from the project README
From the project README

Main components on the SBC4040

74HCT00408174HC144093B4040_CPU4004_CPU4002-14002-274HC7474LS0474LS00DS0026CN74LS16128C64BHM62812874LS0274LS5414289_MEMORY_IF

SBC4040 bill of materials (BOM)

145 components, 54 distinct parts.

QtyPartRefs
1
74HCT00
U1
1
4081
U2
1
74HC14
U3
1
4093B
U4
1
4040_CPU
U5
1
4004_CPU
U6
2
4002-1
U7, U8
2
4002-2
U9, U10
1
74HC74
U11
1
74LS04
U12
2
74LS00
U13, U19
1
DS0026CN
U14
1
74LS161
U15
1
28C64B
U16
2
HM628128
U17, U18
1
74LS02
U20
1
74LS541
U21
1
4289_MEMORY_IF
U22
1
5.185MHz
Y1
1
UART(TTL)
J1
Show 34 more
QtyPartRefs
1
STEP
J2
1
UVROM
J3
1
+5V
J4
1
GND
J5
1
-10V
J6
1
~{TEST}
SW1
1
RESET
SW2
1
INT
SW3
1
SW_DPDT
SW4
3
1N4148
D1, D18, D33
16
LED
D2, D3, D4, D5, D6, D7, D8, D9 +8
1
INTA
D19
1
STPA
D20
12
1N4148
D21, D22, D23, D24, D25, D26, D27, D28 +4
1
LED(5V)
D34
1
1N4735
D35
1
1N4742
D36
1
LED(SBY)
D37
1
LED(-10V)
D38
5
1uF
C1, C2, C6, C8, C11
1
10uF
C3
14
0.1uF
C4, C5, C7, C14, C15, C16, C17, C18 +6
3
0.01uF
C9, C10, C12
1
50pF
C13
2
47uF
C25, C26
15
10k
R1, R2, R4, R5, R10, R12, R24, R25 +7
5
1k
R3, R6, R8, R11, R17
10
100k
R7, R9, R14, R16, R32, R33, R34, R40 +2
2
12k
R13, R15
2
110
R18, R19
2
820
R20, R21
2
5.6k
R22, R23
4
4.7k
R35, R36, R37, R38
6
100k
RN1, RN2, RN3, RN4, RN5, RN6

SBC4040 design files

The KiCad project lives in the ryomuk/SBC4040 repository on GitHub; these links point at the commit this page was built from.

SBC4040: common questions

How big is the SBC4040 PCB?

The SBC4040 measures 190.5 × 127 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SBC4040?

145 components, from 54 distinct parts. The full bill of materials is listed on this page.

Where can I download the SBC4040 design files?

From the ryomuk/SBC4040 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SBC4040 design in my own project?

Yes, under the terms of its MIT license, which ryomuk chose for the repository.

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