2 layers
Keyboard controller
TM90/Keyboard
Have as much as possible open source? Also the tools used to build the keyboard
57 parts3
2 layers305 × 144.2 mm
Keyboard
TM90/Keyboard3Have as much as possible open source? Also the tools used to build the keyboard
- Size
- 305 × 144.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 176
- Nets
- 107
- Pads
- 633
- Tracks, vias
- 1,416, 31
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 9 Jun 2018
- Updated
- 31 Dec 2021
Overview
Keyboard is an open-source printed circuit board by TM90, from the TM90/Keyboard repository on GitHub. It is a 2-layer board of 305 × 144.2 mm with 176 parts on 107 nets, routed with 1,416 tracks and 31 vias.
Its parts include 85 diodes, 84 switches, 1 resistor and 1 connector. It belongs with the keyboards and input boards of this library.
README
README.mdDIY Mechanical Keyboard
Main Idea:
Have as much as possible open source? Also the tools used to build the keyboard
Tool usage:
- KiCAD (schematic, layout) (http://kicad.org/ )
- avr-gcc (https://gcc.gnu.org/wiki/avr-gcc )
- Export data for alu body from a layer in the KiCAD layout data
Electronic
Own layout and schematic but based on this project to keep compatibility with tmk firmware and qmk firmware:
https://github.com/tmk/HHKB_controller/blob/master/schematic/HHKB_controller_revG.pdf
Datasheets
Power
- LM1117 3.3V LDO http://cdn-reichelt.de/documents/datenblatt/A200/LM1117-TI.pdf
- NCP1402 step up DCDC Converter https://www.onsemi.com/pub/Collateral/NCP1402-D.PDF ->farnell: out of production - Alternative MAX1724 https://www.mouser.de/datasheet/2/256/MAX1722-MAX1724-97057.pdf but no Kicad Lib yet
- MCP 73831/2 Single Cell Lipo Charge Management Controller http://ww1.microchip.com/downloads/en/DeviceDoc/20001984g.pdf
Bluetooth
- RN42 Bluetooth Module http://ww1.microchip.com/downloads/en/DeviceDoc/50002328A.pdf
Microcontroller
- ATMEGA32U4 8 bit Microcontroller with USB http://ww1.microchip.com/downloads/en/devicedoc/atmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf
- AT90USB1286 8 bit Microcontroller with USB but more IO than ATMEGA32U4 http://ww1.microchip.com/downloads/en/DeviceDoc/doc7593.pdf
Mechanical
Sandwich case or alu bend case
Software/Firmware
Other:
http://www.keyboard-layout-editor.com/#/
Prototype for Switches without big PCB and description how to build a small keyboard: https://learn.sparkfun.com/tutorials/cherry-mx-switch-breakout-hookup-guide
Fullsize Keyboard matrix example with atmega32u4: https://easyeda.com/farmakon/GH80_3000-4f3cee521afd4be3858c4b5cc3b76f9e
Manufacturer:
PCB:
- beta layout https://de.beta-layout.com/leiterplatten/
- LiteOn https://www.leiton.de/index.html
- jlcpcb https://jlcpcb.com/
Mechanical:
Maybe using a front panel service for the keyboard front, aluminum or acrylic would be possible at beta layout
Parts
176| Qty | Value | Footprint | References |
|---|---|---|---|
| 84 | D | Diodes_SMD:D_0805 | D1, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24 +68 |
| 73 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_1.00u_PCB | SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24, SW25, SW27, SW28, SW29 +57 |
| 3 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_1.25u_PCB | SW10, SW11, SW12 |
| 2 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_2.25u_PCB | SW3, SW4 |
| 2 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_1.50u_PCB | SW8, SW9 |
| 2 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_1.75u_PCB | SW6, SW7 |
| 1 | 10k | Resistors_SMD:R_0805 | R1 |
| 1 | CONN_02X10 | Pin_Headers:Pin_Header_Straight_2x10_Pitch1.27mm_SMD | J1 |
| 1 | LED | LEDs:LED_D3.0mm | D2 |
| 1 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_6.25u_PCB | SW1 |
| 1 | SW_Push | Buttons_Switches_Keyboard:SW_Cherry_MX1A_2.00u_PCB | SW5 |
| 1 | TestPoint | Connectors:PINTST | TP1 |
The 172 most common of 176 parts.
Questions
How big is the Keyboard PCB?
It measures 305 × 144.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Keyboard use?
176 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Keyboard KiCad files?
From the TM90/Keyboard repository on GitHub, at the commit this page was made from: the board is electronics/keyboard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keyboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask TM90 before reusing the design.
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