Omega-Keyboard
About the Omega-Keyboard PCB
Omega-Keyboard is an open source PCB design by merlinkv, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 333.4 × 124.5 mm, with 96 components from 85 distinct parts.
Other key parts include the 74LS145 and 74LS07. By type, the board carries 73 switches, 6 diodes, 4 resistors, 3 capacitors, 2 ICs and 1 connector.
It belongs with the keyboards designs in this gallery.
From the project
Update of the Omega Home Computer Project
This project is an open source implementation of an MSX2 compatible computer. The project is built using a combination of 1980's era components - Z80 CPU, V9958 VDP, AY-3-8910/YM2149F PSG, 8255 PPI, 7400-series logic, and some newer components, such as 512 KiB SRAM and 512 KiB Flash ROM and a few simple programmable logic devices (ATF16V8B SPLDs).
* 14-04-2024 - Version updated to 1.2 MKV - Schematics, PCB and Gerbers successfully ported to KiCad 8.0.1 - The board has been rerouted. - Some components are now SMD - Interactive BOM
Main components on the Omega-Keyboard
Omega-Keyboard bill of materials (BOM)
96 components, 85 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS145 | IC_DIP16_300 | U1 |
| 1 | 74LS07 | IC_DIP14_300 | U2 |
| 1 | KEYBOARD | Conn_Pin_Header_8x2_2.54mm | J1 |
| 7 | HOLE | Hole_3mm | HOLE1, HOLE2, HOLE3, HOLE4, HOLE5, HOLE6, HOLE7 |
| 1 | 0 | CHERRY_PCB_100H | SW1 |
| 1 | 1 | CHERRY_PCB_100H | SW2 |
| 1 | 2 | CHERRY_PCB_100H | SW3 |
| 1 | 3 | CHERRY_PCB_100H | SW4 |
| 1 | 4 | CHERRY_PCB_100H | SW5 |
| 1 | 5 | CHERRY_PCB_100H | SW6 |
| 1 | 6 | CHERRY_PCB_100H | SW7 |
| 1 | 7 | CHERRY_PCB_100H | SW8 |
| 1 | 8 | CHERRY_PCB_100H | SW9 |
| 1 | 9 | CHERRY_PCB_100H | SW10 |
| 1 | MINUS | CHERRY_PCB_100H | SW11 |
| 1 | EQUALS | CHERRY_PCB_100H | SW12 |
| 1 | BACK_SLASH | CHERRY_PCB_150H | SW13 |
| 1 | LEFT_BRACKET | CHERRY_PCB_100H | SW14 |
| 1 | RIGHT_BRACKET | CHERRY_PCB_100H | SW15 |
| 1 | SEMICOLON | CHERRY_PCB_100H | SW16 |
Show 65 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | QUOTE | CHERRY_PCB_100H | SW17 |
| 1 | TILDE | CHERRY_PCB_100H | SW18 |
| 1 | COMMA | CHERRY_PCB_100H | SW19 |
| 1 | PERIOD | CHERRY_PCB_100H | SW20 |
| 1 | SLASH | CHERRY_PCB_100H | SW21 |
| 1 | DEAD | CHERRY_PCB_125H | SW22 |
| 1 | A | CHERRY_PCB_100H | SW23 |
| 1 | B | CHERRY_PCB_100H | SW24 |
| 1 | C | CHERRY_PCB_100H | SW25 |
| 1 | D | CHERRY_PCB_100H | SW26 |
| 1 | E | CHERRY_PCB_100H | SW27 |
| 1 | F | CHERRY_PCB_100H | SW28 |
| 1 | G | CHERRY_PCB_100H | SW29 |
| 1 | H | CHERRY_PCB_100H | SW30 |
| 1 | I | CHERRY_PCB_100H | SW31 |
| 1 | J | CHERRY_PCB_100H | SW32 |
| 1 | K | CHERRY_PCB_100H | SW33 |
| 1 | L | CHERRY_PCB_100H | SW34 |
| 1 | M | CHERRY_PCB_100H | SW35 |
| 1 | N | CHERRY_PCB_100H | SW36 |
| 1 | O | CHERRY_PCB_100H | SW37 |
| 1 | P | CHERRY_PCB_100H | SW38 |
| 1 | Q | CHERRY_PCB_100H | SW39 |
| 1 | R | CHERRY_PCB_100H | SW40 |
| 1 | S | CHERRY_PCB_100H | SW41 |
| 1 | T | CHERRY_PCB_100H | SW42 |
| 1 | U | CHERRY_PCB_100H | SW43 |
| 1 | V | CHERRY_PCB_100H | SW44 |
| 1 | W | CHERRY_PCB_100H | SW45 |
| 1 | X | CHERRY_PCB_100H | SW46 |
| 1 | Y | CHERRY_PCB_100H | SW47 |
| 1 | Z | CHERRY_PCB_100H | SW48 |
| 1 | SHIFT | CHERRY_PCB_225H | SW49 |
| 1 | CTRL | CHERRY_PCB_125H | SW50 |
| 1 | GRAPH | CHERRY_PCB_125H | SW51 |
| 1 | CAPS_LOCK | CHERRY_PCB_175H | SW52 |
| 1 | CODE/KANA | CHERRY_PCB_125H | SW53 |
| 1 | F1/F6 | CHERRY_PCB_100H | SW54 |
| 1 | F2/F7 | CHERRY_PCB_100H | SW55 |
| 1 | F3/F8 | CHERRY_PCB_100H | SW56 |
| 1 | F4/F9 | CHERRY_PCB_100H | SW57 |
| 1 | F5/F10 | CHERRY_PCB_100H | SW58 |
| 1 | ESC | CHERRY_PCB_100H | SW59 |
| 1 | TAB | CHERRY_PCB_150H | SW60 |
| 1 | STOP | CHERRY_PCB_100H | SW61 |
| 1 | BACK_SPACE | CHERRY_PCB_200H | SW62 |
| 1 | SELECT | CHERRY_PCB_125H | SW63 |
| 1 | RETURN | CHERRY_PCB_225H | SW64 |
| 1 | SPACE | CHERRY_PCB_625H | SW65 |
| 1 | HOME/CLS | CHERRY_PCB_100H | SW66 |
| 1 | INSERT | CHERRY_PCB_100H | SW67 |
| 1 | DELETE | CHERRY_PCB_100H | SW68 |
| 1 | LEFT | CHERRY_PCB_100H | SW69 |
| 1 | UP | CHERRY_PCB_100H | SW70 |
| 1 | DOWN | CHERRY_PCB_100H | SW71 |
| 1 | RIGHT | CHERRY_PCB_100H | SW72 |
| 1 | SHIFT | CHERRY_PCB_275H | SW73 |
| 1 | POWER | LED_3mm | D1 |
| 1 | CAPS | CHERRY_MX_LED | D2 |
| 1 | KANA | CHERRY_MX_LED | D3 |
| 3 | 1N4148 | Diode_762 | D4, D5, D6 |
| 2 | 0.1uF | Cap_Cer_508 | C1, C2 |
| 1 | 10uF | Cap_Tant_508 | C3 |
| 3 | 470 | Res_762 | R1, R2, R3 |
| 1 | 4.7k | Conn_SIL6 | RN1 |
Omega-Keyboard design files
The KiCad project lives in the merlinkv/Omega_MSX2 repository on GitHub; these links point at the commit this page was built from.
Omega-Keyboard: common questions
How big is the Omega-Keyboard PCB?
The Omega-Keyboard measures 333.4 × 124.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Omega-Keyboard?
96 components, from 85 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Omega-Keyboard design files?
From the merlinkv/Omega_MSX2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Omega-Keyboard design in my own project?
Yes, under the terms of its GPL-3.0 license, which merlinkv chose for the repository.
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