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A split, low profile, hot swappable, columnar staggered, wireless keyboard custom themed and custom designed for my hand shape and use in programming.

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etashj/banana-split

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banana 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 :/ render 2

Case & Keycaps

case keycap

PCB

render 1 july 7 PCB Routed Front PCB Routed Back PCB

ErgoPad Layout

Design your own at this link Ergopad w/ Outline

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

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A split, low profile, hot swappable, columnar staggered, wireless keyboard custom themed and custom designed for my hand shape and use in programming.

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