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Top5x8kbd

zuiko21·minimOS·hard/kicad/top5x8kbd/top5x8kbd.kicad_pcb

Top5x8kbd PCB layout, top view — open source board by zuiko21
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About the Top5x8kbd PCB

Top5x8kbd is an open source PCB design by zuiko21, published on GitHub under the MIT license. It is a 2-layer board measuring 177.8 × 130.8 mm, with 67 components from 54 distinct parts.

Other key parts include the 74HC138, 74HC86, 74HC174, 74HC245 and 74HC595. By type, the board carries 40 switches, 9 ICs, 8 diodes, 7 connectors and 3 resistors.

It belongs with the retro computing designs in this gallery.

From the project

Scalable OS for 6502/65816

With great embarrassment I have to admit never having owned a 65xx computer... but suport for these classic machines shouldn't be difficult to add -- for instance, I have declared as 'reserved' the two first zero-page bytes in case the utterly popular Commodore-64 (using a 6510) is targeted.

Back to my own-designed devices, here's the range (past, present and future):

Main components on the Top5x8kbd

74HC13874HC8674HC17474HC24574HC595

Top5x8kbd bill of materials (BOM)

67 components, 54 distinct parts.

QtyPartRefs
1
74HC138
U1
1
74HC86
U9
2
74HC174
U12, U26
3
74HC245
U13, U24, U45
2
74HC595
U34, U55
2
IOx
J1, J2
1
TO COMPUTER
J5
1
COLUMN
J16
1
ROW
J17
1
NES 1
J33
1
NES 2
J54
1
1 !
SW1
1
2 @
SW2
1
3 #
SW3
1
4 $
SW4
1
5 %
SW5
1
6 &
SW6
1
7 '
SW7
1
8 (
SW8
1
9 )
SW9
Show 34 more
QtyPartRefs
1
0 _
SW10
1
Q ¡
SW11
1
W ~~
SW12
1
E é
SW13
1
R <
SW14
1
T >
SW15
1
Y ü
SW16
1
U ú
SW17
1
I í
SW18
1
O ó
SW19
1
P "
SW20
1
A á
SW21
1
S ;
SW22
1
D |
SW23
1
F [
SW24
1
G ]
SW25
1
H ^
SW26
1
J -
SW27
1
K +
SW28
1
L =
SW29
1
ENTER ñ
SW30
1
SHIFT
SW31
1
Z :
SW32
1
X ¿
SW33
1
C ?
SW34
1
V /
SW35
1
B *
SW36
1
N ,
SW37
1
M .
SW38
1
ALT
SW39
1
SPACE
SW40
8
4148
D11, D12, D13, D14, D15, D16, D17, D18
2
220K
RN3, RN22
1
10K
RN11

Top5x8kbd design files

The KiCad project lives in the zuiko21/minimOS repository on GitHub; these links point at the commit this page was built from.

Top5x8kbd: common questions

How big is the Top5x8kbd PCB?

The Top5x8kbd measures 177.8 × 130.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Top5x8kbd?

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

Where can I download the Top5x8kbd design files?

From the zuiko21/minimOS repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Top5x8kbd design in my own project?

Yes, under the terms of its MIT license, which zuiko21 chose for the repository.

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