Petkb
About the Petkb PCB
Petkb is an open source PCB design by sjgray, published on GitHub. It is a 2-layer board measuring 386.1 × 100 mm, with 84 components from 82 distinct parts.
By type, the board carries 75 switches, 8 connectors and 1 resistor.
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.
Petkb bill of materials (BOM)
84 components, 82 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | Conn_01x20 | PinHeader_1x20_P2.54mm_Vertical | J1, J2 |
| 1 | POWER LED | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Conn_02x03_Odd_Even | PinHeader_2x03_P2.54mm_Vertical | J4 |
| 1 | SPACE1 | PinHeader_2x02_P2.54mm_Vertical | J5 |
| 1 | SPACE2 | PinHeader_2x02_P2.54mm_Vertical | J6 |
| 2 | Conn_02x02_Odd_Even | PinHeader_2x02_P2.54mm_Vertical | J11, J27 |
| 1 | ":" | SW_Cherry_MX_1.00u_PCB | SW3 |
| 1 | STOP | SW_Cherry_MX_1.00u_PCB | SW4 |
| 1 | "9" | SW_Cherry_MX_1.00u_PCB | SW5 |
| 1 | "6" | SW_Cherry_MX_1.00u_PCB | SW6 |
| 1 | "3" | SW_Cherry_MX_1.00u_PCB | SW7 |
| 1 | B ARROW | SW_Cherry_MX_1.00u_PCB | SW8 |
| 1 | "KP 1" | SW_Cherry_MX_1.00u_PCB | SW9 |
| 1 | "/" | SW_Cherry_MX_1.00u_PCB | SW10 |
| 1 | NC $15 | SW_Cherry_MX_1.50u_PCB | SW11 |
| 1 | HOME | SW_Cherry_MX_1.00u_PCB | SW12 |
| 1 | "M" | SW_Cherry_MX_1.00u_PCB | SW13 |
| 1 | SPACE | SW_Cherry_MX_6.25u_PCB | SW14 |
| 1 | "X" | SW_Cherry_MX_1.00u_PCB | SW15 |
| 1 | RVS | SW_Cherry_MX_1.00u_PCB | SW16 |
Show 62 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | "KP 2" | SW_Cherry_MX_1.00u_PCB | SW17 |
| 1 | RPT | SW_Cherry_MX_1.00u_PCB | SW18 |
| 1 | "0" | SW_Cherry_MX_2.00u_PCB | SW20 |
| 1 | "," | SW_Cherry_MX_1.00u_PCB | SW21 |
| 1 | "N" | SW_Cherry_MX_1.00u_PCB | SW22 |
| 1 | "V" | SW_Cherry_MX_1.00u_PCB | SW23 |
| 1 | "Z" | SW_Cherry_MX_1.00u_PCB | SW24 |
| 1 | "KP 3" | SW_Cherry_MX_1.00u_PCB | SW25 |
| 1 | R SHIFT | SW_Cherry_MX_1.50u_PCB | SW26 |
| 1 | NC $19 | SW_Cherry_MX_1.25u_PCB | SW27 |
| 1 | "KP ." | SW_Cherry_MX_1.00u_PCB | SW28 |
| 1 | "." | SW_Cherry_MX_1.00u_PCB | SW29 |
| 1 | "B" | SW_Cherry_MX_1.00u_PCB | SW30 |
| 1 | "C" | SW_Cherry_MX_1.00u_PCB | SW31 |
| 1 | L SHIFT | SW_Cherry_MX_1.50u_PCB | SW32 |
| 1 | "KP 4" | SW_Cherry_MX_1.00u_PCB | SW33 |
| 1 | "[" | SW_Cherry_MX_1.00u_PCB | SW34 |
| 1 | "O" | SW_Cherry_MX_1.00u_PCB | SW35 |
| 1 | DOWN | SW_Cherry_MX_1.00u_PCB | SW36 |
| 1 | "U" | SW_Cherry_MX_1.00u_PCB | SW37 |
| 1 | "T" | SW_Cherry_MX_1.00u_PCB | SW38 |
| 1 | "E" | SW_Cherry_MX_1.00u_PCB | SW39 |
| 1 | "Q" | SW_Cherry_MX_1.00u_PCB | SW40 |
| 1 | DEL | SW_Cherry_MX_1.00u_PCB | SW41 |
| 1 | "P" | SW_Cherry_MX_1.00u_PCB | SW42 |
| 1 | "I" | SW_Cherry_MX_1.00u_PCB | SW43 |
| 1 | "\" | SW_Cherry_MX_1.00u_PCB | SW44 |
| 1 | "Y" | SW_Cherry_MX_1.00u_PCB | SW45 |
| 1 | "R" | SW_Cherry_MX_1.00u_PCB | SW46 |
| 1 | "W" | SW_Cherry_MX_1.00u_PCB | SW47 |
| 1 | TAB | SW_Cherry_MX_1.50u_PCB | SW48 |
| 1 | "KP 6" | SW_Cherry_MX_1.00u_PCB | SW49 |
| 1 | "@" | SW_Cherry_MX_1.00u_PCB | SW50 |
| 1 | "L" | SW_Cherry_MX_1.00u_PCB | SW51 |
| 1 | RETURN | SW_Cherry_MX_2.00u_PCB | SW52 |
| 1 | "J" | SW_Cherry_MX_1.00u_PCB | SW53 |
| 1 | "G" | SW_Cherry_MX_1.00u_PCB | SW54 |
| 1 | "D" | SW_Cherry_MX_1.00u_PCB | SW55 |
| 1 | "A" | SW_Cherry_MX_1.00u_PCB | SW56 |
| 1 | "KP 5" | SW_Cherry_MX_1.00u_PCB | SW57 |
| 1 | ";" | SW_Cherry_MX_1.00u_PCB | SW58 |
| 1 | "K" | SW_Cherry_MX_1.00u_PCB | SW59 |
| 1 | "]" | SW_Cherry_MX_1.00u_PCB | SW60 |
| 1 | "H" | SW_Cherry_MX_1.00u_PCB | SW61 |
| 1 | "F" | SW_Cherry_MX_1.00u_PCB | SW62 |
| 1 | "S" | SW_Cherry_MX_1.00u_PCB | SW63 |
| 1 | ESC | SW_Cherry_MX_1.00u_PCB | SW64 |
| 1 | "KP 9" | SW_Cherry_MX_1.00u_PCB | SW65 |
| 1 | U ARROW | SW_Cherry_MX_1.00u_PCB | SW67 |
| 1 | "KP 7" | SW_Cherry_MX_1.00u_PCB | SW68 |
| 1 | "0" | SW_Cherry_MX_1.00u_PCB | SW69 |
| 1 | "7" | SW_Cherry_MX_1.00u_PCB | SW70 |
| 1 | "4" | SW_Cherry_MX_1.00u_PCB | SW71 |
| 1 | "1" | SW_Cherry_MX_1.00u_PCB | SW72 |
| 1 | NC $0E | SW_Cherry_MX_1.00u_PCB | SW74 |
| 1 | RIGHT | SW_Cherry_MX_1.00u_PCB | SW75 |
| 1 | "KP 8" | SW_Cherry_MX_1.00u_PCB | SW76 |
| 1 | "-" | SW_Cherry_MX_1.00u_PCB | SW77 |
| 1 | "8" | SW_Cherry_MX_1.00u_PCB | SW78 |
| 1 | "5" | SW_Cherry_MX_1.00u_PCB | SW79 |
| 1 | "2" | SW_Cherry_MX_1.00u_PCB | SW80 |
| 1 | R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
Petkb 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.
- LayoutPET-B/B-V1-R2/petkb.kicad_pcb
- SchematicPET-B/B-V1-R2/petkb.kicad_sch
Petkb: common questions
How big is the Petkb PCB?
The Petkb measures 386.1 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Petkb?
84 components, from 82 distinct parts. The full bill of materials is listed on this page.
Where can I download the Petkb design files?
From the sjgray/CBM-MX-Keyboards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Petkb 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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