2 layers142.5 × 106.3 mm
2 layers299.8 × 108.9 mm
Routed banana split
etashj/banana-splitA split, low profile, hot swappable, columnar staggered, wireless keyboard custom themed and custom designed for my hand shape and use in programming.
- Size
- 299.8 × 108.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 88
- Nets
- 90
- Pads
- 596
- Tracks, vias
- 1,114, 30
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Jul 2025
- Updated
- 7 Jul 2025
Overview
Routed banana split is an open-source printed circuit board by etashj, from the etashj/banana-split repository on GitHub. It is a 2-layer board of 299.8 × 108.9 mm with 88 parts on 90 nets, routed with 1,114 tracks and 30 vias.
Its parts include 40 diodes and 40 switches. It belongs with the nRF52 and nRF5x boards of this library.
README
README.mdbanana split
A split, tented keyboard with columnar staggering. Designed from scratch with ergogen, KiCad, and Fusion 360, and fully open-source. Runs on 18650 batteries (3.7V 1200 mAh) which provide a mass for tenting. Plan to use a clear acrylic sandwich case which. Design will feature clear case, white keys, brown modifiers, and yellow home "row" for a banana split. 40 keys with 4 layer cusotmizable layout. Uses 2 nice!nano and nice!view boards which show status.
Making this because there arent really many ergonomic, but compact keybaord for large hand (almost oxymoronic) which also feature mechanical switches.
More Photos/CAD model coming soon :/
Case & Keycaps
PCB
ErgoPad Layout
Features:
- Low profile mechanical switches
- Low profile sculpted keycaps
- Wireless! Uses 2 nice!nano (I think)
- Small display for status info and idle image (2 nice!view)
- Small/durable 3D printed case
- Hot swappable switches
- Reaosnably large battery
- Easy to switch between the onboard MBP keyboard and good macOS compatibility. (this is a layout consderation).
- Small-ish/Portable (Ideally msaller than a handheld console like the Swithc so the case can be used)
- Customaized for my (larger) hands
- Fewer keycaps (less movement)
Bill of Materials
| Part Name | Source | Qt | Unit Price | Price | Note |
|---|---|---|---|---|---|
| PCB | JLCPCB | 5 | 3.28 | 16.4 | min 5 |
| Clear Case | JLC3DP | 1 | 30.64 | 30.64 | |
| Keycaps | JLC3DP | 40 | 0.3 | 12 | |
| Nice!Nano | Typeractive | 2 | 25 | 50 | |
| Nice!View | Typeractive | 2 | 20 | 40 | |
| Twilight Silent Kalih Choc V1 | BeeKeeb | 40 | 1.05 | 42 | |
| Choc V1 HotSwap Sockets 100pc | AliExpress | 1 | 7.40 | 7.40 | Best price is at 100 pc |
| M3 Screw and Nut Set | AliExpress | 1 | 3.94 | 3.94 | |
| Rubber Feet 4pk | AliExpress | 2 | 0.91 | 1.82 | |
| 18650 Battery Holder | AliExpress | 2 | 1.16 | 2.32 | |
| 18650 Cell | LIION Wholesale | 2 | 3.49 | 6.98 | |
| Surface Mount Push Switch | SparkFun | 2 | 1.05 | 2.1 |
Parts
88| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | ComboDiode | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +24 | |
| 40 | PG1350 | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +24 | |
| 2 | ceoloide:battery_connector_jst_ph_2 | JST1, JST2 | |
| 2 | ceoloide:display_nice_view | DISP1, DISP2 | |
| 2 | E73:SW_TACT_ALPS_SKQGABE010 | B1, B2 | |
| 2 | nice_nano | nice_nano | MCU1, MCU2 |
Questions
How big is the Routed banana split PCB?
It measures 299.8 × 108.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Routed banana split use?
88 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 Routed banana split KiCad files?
From the etashj/banana-split repository on GitHub, at the commit this page was made from: the board is ergogen-out/pcbs/routed_banana_split.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Routed banana split design in my own project?
Its repository states no licence, so its author keeps all rights: ask etashj before reusing the design.
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