takayoshiotake / five-octave-61-key-keyboard

A 61-key (5-octave) keyboard

Five Octave

A 61-key (5-octave) keyboard. Powered by Vial firmware.

Layout

Layer 0:

📄 keyboard-layout.png (v0.3.0)

MEMO: When pressed individually and released, it becomes the lower right keys (英数 and かな).

Layer 1:

📄 keyboard-layout-1.png

Layer 2:

📄 keyboard-layout-2.png

MEMO: I couldn't figure out how to achieve 'fn' with adafruit_hid, so I'm using Karabiner to remap right_option to 'fn' and using it that way.

RAW data for Keyboard Layout Editor v0.15:

📄 keyboard-layout.rawdata.json

[{"a":4,"f":3},"Esc","!\n1","@\n2","#\n3","$\n4","%\n5","^\n6","&\n7","*\n8","(\n9",")\n0","_\n-","+\n=","|\n\\","~\n`"],
[{"w":1.5},"Tab","Q","W","E","R","T","Y","U","I","O","P","{\n[","}\n]",{"w":1.5},"BS"],
[{"w":1.75},"MO(1)\n\n\n英数","A","S","D","F","G","H","J","K","L",":\n;","\"\n'",{"w":2.25},"Return"],
[{"w":2.25},"Shift","Z","X","C","V","B","N","M","<\n,",">\n.","?\n/",{"w":1.75},"Shift","MO(2)"],
[{"w":1.25},"Ctrl",{"w":1.25},"Opt",{"w":1.25},"Cmd\n\n\n英数",{"a":7,"w":6.25},"6.25u",{"a":4},"Cmd\n\n\nかな","Opt"]

📄 keyboard-layout-1.rawdata.json

[{"a":4,"f":3},"Esc",{"c":"#aaccaa"},"F1","F2","F3","F4","F5","F6","F7","F8","F9","F10","F11","F12",{"c":"#cccccc"},"|\n\\","~\n`"],
[{"w":1.5},"Tab",{"c":"#aaccaa"},"Home","Up","End","PgUp",{"c":"#cccccc"},"T","Y","BS",{"c":"#cccccc"},"I","O","P","{\n[","}\n]",{"w":1.5},"BS"],
[{"c":"#aaccaa","w":1.75},"","Left","Down","Right","PgDn",{"c":"#cccccc"},"G",{"c":"#aaccaa"},"Enter","kana",{"c":"#cccccc"},"K","L",":\n;","\"\n'",{"w":2.25},"Return"],
[{"w":2.25},"Shift","Z","X","C","V","B","N","M","<\n,",">\n.","?\n/",{"w":1.75},"Shift",{"c":"#aaccaa"},"",{"c":"#cccccc"}],
[{"w":1.25},"Ctrl",{"w":1.25},"Opt",{"w":1.25},"Cmd\n\n\n英数",{"a":7,"w":6.25},"6.25u",{"a":4},"Cmd\n\n\nかな","Opt"]

📄 keyboard-layout-2.rawdata.json

[{"a":4,"f":3},"Esc",{"c":"#aaccaa"},"F1","F2","F3","F4","F5","F6","F7","F8","F9","F10","F11","F12",{"c":"#cccccc"},"|\n\\","~\n`"],
[{"w":1.5},"Tab","Q","W","E","R","T","Y","U","I","O","P",{"c":"#aaccaa"},"Up",{"c":"#cccccc"},"}\n]",{"w":1.5},"BS"],
[{"c":"#aaccaa","w":1.75},"CapsLock",{"c":"#cccccc"},"A","S","D","F","G","H","J","K","L",{"c":"#aaccaa"},"left","right",{"c":"#cccccc","w":2.25},"Return"],
[{"w":2.25},"Shift","Z","X","C","V","B","N","M","<\n,",">\n.",{"c":"#aaccaa"},"Down",{"c":"#cccccc","w":1.75},"Shift",{"c":"#aaccaa"},"",{"c":"#cccccc"}],
[{"w":1.25},"Ctrl",{"w":1.25},"Opt",{"w":1.25},"Cmd\n\n\n英数",{"a":7,"w":6.25},"6.25u",{"a":4},"Cmd\n\n\nかな","Opt"]]

• 🔗 Keyboard Layout Editor

BOM

Material	QTY	Note
Five Octave MCU Board	1
Five Octave Keys Board	1
Five Octave Enclosure	1
0151660169	1	Molex 0.50mm pitch FFC, Type A, 127.00mm, 16 circuits

• 🔗 Molex Connector Part Number - 15166-0169 | Molex

Five Octave MCU Board

Material	Symbol	QTY	Note	JLCPCB Part #
30pF 0402	C1, C2	2		C1570
1uF 0402	C3, C4	2		C52923
100nF 0402	C5-C14	10		C307331
10uF 0402	C15, C16	2		C15525
HRO_TYPE-C-31-M-12	J1	1	USB Type-C Connector, Korean Hroparts Elec	C165948
AFC01-S16FCC-00	J2	1	FFC Connector 0.50mm pitch 16 circuits, JUSHUO	C262272
WS2812C-2020-V1	LED1	1	NeoPixel RGB LED 2x2mm, Worldsemi	C2976072
10KΩ 0402	R1, R3	2		C25744
1KΩ 0402	R2, R4	2		C11702
27Ω 0402	R5, R6	2		C352446
5.1KΩ 0402	R7, R8	2		C25905
SKRPANE010	SW1, SW2	2	Tactile Switch, ALPS ALPINE	C470426
RP2040	U1	1	MCU, Raspberry Pi	C2040
W25Q64JVXGIQ	U2	1	64M-bit Serial Flash, Winbond Electronics	C2940195
AP2112K-3.3TRG1	U3	1	3.3V Linear Voltage Regulators	C51118
X322512MSB4SI	Y1	1	12MHz 20pF Crystal Resonator, SMD-3225, Yangxing Tech	C9002

Five Octave Keys Board

Material	Symbol	QTY	Note	JLCPCB Part #
1N4148WS	D1-D61	61		C2128
CPG151101S11-16	SW1-SW61	61	How Swap Socket, Kailh	C5156480
AFC01-S16FCC-00	J1	1	FFC Connector 0.50mm pitch 16 circuits, JUSHUO	C262272

• 🔗 JLCPCB | Assembly Parts Lib

Five Octave Enclosure

Material	Symbol	QTY	Note
Five Octave Enclosure - Case		1	(or Enclosure v2)
Five Octave Enclosure - Top Frame		1	(or Enclosure v2)
Screw M2 x 8mm		4	Secure Case and Top Frame
Screw M2 x 5mm or 4mm		4	Secure Case and Five Octave MCU
Poron 1.5t 3mm x 120mm		2	For gasket mounting
Poron 1.5t 3mm x 60mm		6	For gasket mounting
Poron 1.5t 3mm x 40mm		2	For gasket mounting

Schematic and PCB

Five Octave MCU

📄 Five_Octave_MCU.kicad_sch (v1.0.0)

📄 Five_Octave_MCU.kicad_pcb (v1.0.0)

📄 Five_Octave_MCU.svg

Five Octave Keys

📄 Five_Octave_Keys.kicad_sch (v1.0.0)

📄 Five_Octave_Keys.kicad_pcb (v1.0.0)

📄 Five_Octave_Keys.svg

Key-matrix (8x8)

	C0	C1	C2	C3	C4	C5	C6	C7
R0	Esc		1	2	3	4	5	6
R1	Tab			Q	W	E	R	T
R2	Caps	Z	X	A	S	D	F	G
R3	Shift	Ctrl	Opt	Cmd	Space	C	V	B
R4	7	8	9	0	-	=	\	`
R5	Y	U	I	O	P	[	]	BS
R6	H	J	K	L	;	'	Return	Fn
R7	N	M	,	.	/	Shift	Cmd	MO(1)

Mechanics

Five Octave Enclosure

📄 Five_Octave_Enclosure.FCStd (v1.0.1)

Five Octave Enclosure v2

📄 Five_Octave_Enclosure_v2.FCStd (v2.1.2)

Plate

📄 Five_Octave_Plate.kicad_pcb (v1.0.0)

Firmware

You can use Vial or CircuitPython.

Vial

• Built UF2
  • 📄 takayoshiotake_five_octave_vial_20240103.uf2
• Code
  • 🔗 https://github.com/vial-kb/vial-qmk/tree/vial/keyboards/takayoshiotake/five_octave
  • 🔗 https://github.com/vial-kb/vial-qmk/tree/49f5eec0d46f3524850885ffae9dee2982312e50

See vial-porting for more details.

CircuitPython

Software for the Five Octave runs on CircuitPython. Its CircuitPython is the same as the one for Octave (https://github.com/takayoshiotake/octave-12-key-macropad).

• Built UF2
  • 🔗 https://adafruit-circuit-python.s3.amazonaws.com/index.html?prefix=bin/takayoshiotake_octave_rp2040/
  • 📄 adafruit-circuitpython-takayoshiotake_octave_rp2040-en_US-8.2.6.uf2
• Code
  • 🔗 adafruit/circuitpython
    • 🔗 https://github.com/adafruit/circuitpython/tree/main/ports/raspberrypi/boards/takayoshiotake_octave_rp2040

See circuitpython-app/README.md for application software.

Gallery

Keycap: Drop + biip MT3 Extended 2048

MEMO: Alminum 6061 CNC + Bead blasting 120 mesh + Anodizing natural matte by JLCPCB (Five Octave Enclosure v1.0.0)

Photos with Enclosure v2

Keycap: Drop + biip MT3 Extended 2048

MEMO: Alminum 6061 CNC + Bead blasting 150 mesh + Hardcoat anodizing natural matte by JLCPCB (Five Octave Enclosure v2.1.1)

License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.