Expanded SplitKbs
About the Expanded SplitKbs PCB
Expanded SplitKbs is an open source PCB design by oceanKeebs, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 66.9 × 72.6 mm, with 25 components from 11 distinct parts.
Other key parts include the PGA2040. By type, the board carries 7 connectors, 7 switches, 6 diodes, 2 resistors and 1 IC.
It belongs with the keyboards designs in this gallery.
From the project
KeebPort, a split Keyboard architecture using a single micro controller as a central "port"
Keeb Port is a split keyboard architecture with a central part housing a micro controller and 6 keys (two keys can be replaced with encoders optionally). Right and left part of the split keyboard do not include a micro controller but an IO expander (MCP23017) processing the key activation information and connected via i2c to the central part. The LED control signal is generated by the micro controller and provided via a separate line to both split keyboard parts. Central and split keyboard parts are connected with TRRRS (5-pin). All layouts share the same firmware.
Main components on the Expanded SplitKbs
Expanded SplitKbs bill of materials (BOM)
25 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PGA2040 | PGA2040 | U1 |
| 2 | Conn_01x04_Female | PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 2 | TRRRS_Connector | TRRRS_NBA1-24-001 | J3, J6 |
| 2 | TRRS_Connector | TRRS_PJ-320A | J4, J5 |
| 1 | USB_C_Plug | USB_C_C2927037 | P1 |
| 2 | RotaryEncoder_Switch | MX_lss_100U_Rotary | SW1, SW3 |
| 4 | SW_Push | MX_lss_100U | SW2, SW4, SW5, SW6 |
| 1 | SW_Push | Reset_Switch | SW7 |
| 2 | Conn_01x06_Shielded | Hirose_FH12-6S-0.5SH_1x06-1MP_P0.50mm_Horizontal | TPS43, TPS65 |
| 6 | D_Small | Diode_SMD_Round_Pads | D1, D2, D3, D4, D5, D6 |
| 2 | 4k7 | Resistor | R1, R2 |
Expanded SplitKbs design files
The KiCad project lives in the oceanKeebs/KeebPort repository on GitHub; these links point at the commit this page was built from.
Expanded SplitKbs: common questions
How big is the Expanded SplitKbs PCB?
The Expanded SplitKbs measures 66.9 × 72.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Expanded SplitKbs?
25 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Expanded SplitKbs design files?
From the oceanKeebs/KeebPort repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Expanded SplitKbs design in my own project?
Yes, under the terms of its GPL-2.0 license, which oceanKeebs chose for the repository.
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