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Cbm2mx

sjgray·CBM-MX-Keyboards·CBM2/CBM2-V1-R1/cbm2mx.kicad_pcb

Cbm2mx PCB layout, top view — open source board by sjgray
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About the Cbm2mx PCB

Cbm2mx is an open source PCB design by sjgray, published on GitHub. It is a 2-layer board measuring 380.5 × 157.9 mm, with 106 components from 102 distinct parts.

By type, the board carries 100 switches and 6 connectors.

It belongs with the keyboards and retro computing designs in this gallery.

From the project

Replacement and enhanced keyboards for Commodore machines

CBM MX Keyboards Project Steve J. Gray ========================

This is a project to create replacement keyboards for CBM Machines using standard MX keyswitches. The first goal is to create direct replacements that fit standard CBM cases (if possible).

Keyboards are identified by a string in the following format:

where: KB is the keyboard name Vn is the version#. This is a unique design/layout of a specific keyboard. Rn is the revision#. Generally updates to a specific keyboard version.

Cbm2mx bill of materials (BOM)

106 components, 102 distinct parts.

QtyPartRefs
2
Conn_01x23
J1, J2
1
PK1
J3
1
PK2
J4
1
C=/UP
J5
1
S-LOCK OPT
J7
1
"F1"
SW1
1
"F2"
SW2
1
"F3"
SW3
1
"F4"
SW4
1
"F5"
SW5
1
"F6"
SW6
1
"F7"
SW7
1
"F8"
SW8
1
"F9"
SW9
1
"F10"
SW10
2
"DOWN"
SW11, SW111
1
"UP"
SW12
1
"HOME"
SW13
1
"RVS"
SW14
1
"GRAPH"
SW15
Show 82 more
QtyPartRefs
1
"STOP"
SW16
1
"ESC"
SW17
1
"1"
SW18
1
"2"
SW19
1
"3"
SW20
1
"4"
SW21
1
"5"
SW22
1
"7"
SW23
1
"8"
SW24
1
"9"
SW25
1
"0"
SW26
1
"="
SW27
2
"LEFT"
SW28, SW128
1
KP "?"
SW29
1
KP "CE"
SW30
1
KP "*"
SW31
1
KP "/"
SW32
1
"TAB"
SW33
1
"Q"
SW34
1
"W"
SW35
1
"E"
SW36
1
"R"
SW37
1
"6"
SW38
1
"U"
SW39
1
"I"
SW40
1
"O"
SW41
1
"-"
SW42
1
"B-ARROW"
SW43
2
"RIGHT"
SW44, SW144
1
KP "7"
SW45
1
KP "8"
SW46
1
KP "9"
SW47
1
KP "-"
SW48
1
"A"
SW50
1
"S"
SW51
1
"D"
SW52
1
"T"
SW53
1
"Y"
SW54
1
"J"
SW55
1
"K"
SW56
1
"L"
SW57
1
"P"
SW58
1
"]"
SW59
1
"DEL"
SW60
1
KP "4"
SW61
1
KP "5"
SW62
1
KP "6"
SW63
1
KP "+"
SW64
1
"SHIFT"
SW65
1
"Z"
SW66
1
"X"
SW67
1
"F"
SW68
1
"G"
SW69
1
"H"
SW70
1
"M"
SW71
1
","
SW72
1
";"
SW73
1
"["
SW74
1
"RETURN"
SW75
1
"C="/"UP"
SW76
1
KP "1"
SW77
1
KP "2"
SW78
1
KP "3"
SW79
1
"ENTER"
SW80
1
"CTRL"
SW81
1
"C"
SW83
1
"V"
SW84
1
"B"
SW85
1
"N"
SW86
1
"SPACE"
SW87
1
"."
SW88
1
"/"
SW89
1
"'"
SW90
1
"PI"
SW91
1
KP"0" Reg
SW93
1
KP "."
SW94
1
KP "00"
SW95
1
S-LOCK
SW97
1
R-SHIFT
SW98
1
PRG1
SW101
1
PRG2
SW102
1
KP"0" Alternate
SW193

Cbm2mx design files

The KiCad project lives in the sjgray/CBM-MX-Keyboards repository on GitHub; these links point at the commit this page was built from.

Cbm2mx: common questions

How big is the Cbm2mx PCB?

The Cbm2mx measures 380.5 × 157.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cbm2mx?

106 components, from 102 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cbm2mx design files?

From the sjgray/CBM-MX-Keyboards repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Cbm2mx design in my own project?

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

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