Octave

The Octave is a 12-key macropad. It is primarily designed to be a compact keyboard with support for 12 function keys (F1 - F12).

Status

• prototype-3.1: Upgrade with LEDs under keys
  • LED Animation
  • PCB: OK!
• prototype-3: Simple design
  • Enclosure: OK!
  • Test: OK!
  • PCB: OK!
• prototype-2: Custom MCU board
  • Consideration
  • Test
  • PCB
• prototype-1

Specifications

• USB-C (USB2.0, HID)
  • 🔗 https://pid.codes/1209/8CAE/
• Hot-swap sockets for MX compatible switches
• Programmable firmware (CircuitPython)

Layout

📄 layout/keyboard-layout.png (rev.6)

• 12 function keys (F1 - F12)

RAW data for Keyboard Layout Editor v0.15:

📄 layout/keyboard-layout.rawdata.json

[{f:3},"F1\nF9","F2\nF10","F3\nF11","F4\nF12"],
["F5\nVol-","F6\nVol+","F7\nRW","F8\nFF"],
["Shift","Ctrl","Esc\nLED","MO(1)"]

• 🔗 Keyboard Layout Editor

Schematic

📄 electronics/Octave_Input_PCB.svg (rev.6.1.2)

I have also designed a custom MCU circuit from prototype-2, the MCU is RP2040 and the software runs on CircuitPython built specifically for it.

📄 electronics/Octave_Input_PCB/Octave_Input_PCB.kicad_sch

Upgrade schematic with LEDs under keys

📄 electronics/Octave_Input_LED_PCB.svg (rev.1.0.0)

📄 electronics/Octave_Input_PCB/Octave_Input_LED_PCB.kicad_sch

PCB

📄 electronics/Octave_Input_PCB_3D.png (rev.6.1.3)

📄 electronics/Octave_Input_PCB/Octave_Input_PCB.kicad_pcb

Upgrade PCB with LEDs under keys

📄 electronics/Octave_Input_LED_PCB_3D.png (rev.1.0.0)

📄 electronics/Octave_Input_LED_PCB/Octave_Input_LED_PCB.kicad_pcb

CircuitPython

Software for the Octave (prototype-2, prototype-3) runs on CircuitPython.

Latest:

• 🔗 adafruit/circuitpython
  • 🔗 https://github.com/adafruit/circuitpython/tree/main/ports/raspberrypi/boards/takayoshiotake_octave_rp2040
• 🔗 Built UF2

Older:

• 🔗 takayoshiotake/circuitpython:7.3.x-board-octave-rp2040

  • 🔗 https://github.com/takayoshiotake/circuitpython/tree/c3b4d05dc04d74c6229506215eae799fb23f37ce/ports/raspberrypi/boards/takayoshiotake_octave_rp2040

• How to build:

  • 🔗 https://learn.adafruit.com/building-circuitpython/build-circuitpython
  • 🔗 https://github.com/takayoshiotake/circuitpython/blob/c3b4d05dc04d74c6229506215eae799fb23f37ce/BUILDING.md

Plate

📄 mechanics/Octave_Plate_3D.png (rev.1.0.3)

📄 mechanics/Octave_Plate/Octave_Plate.kicad_pcb

Enclosure

• 📄 mechanics/Octave_Enclosure-Case.stl (rev.1.0.0)
• 📄 mechanics/Octave_Enclosure-Top Frame.stl (rev.1.0.0)

BOM & Software

🏷 prototype-3-pcb

Material	Unit	Designator	Note	JLCPCB Part #
Octave CPU PCB rev.6.1.3	1	n/a	JLCPCB
Octave Input PCB rev.6.1.3 [2]	1	n/a	JLCPCB
Octave Plate rev.1.0.3	1	n/a	JLCPCB, Alminium PCB (t=1.6mm)
0151660120	1	n/a	Molex 0.50mm pitch FFC, Type D, 50.80mm, 12 circuits
CPG151101S11-2	12	SW1-12 [2]	Kailh®︎ hot swap socket (White)
Octave Enclosure Case rev.1.0.0	1	n/a	JLCPCB, 3D printing (MJF), PA12-HP Nylon
Octave Enclosure Top Frame rev.1.0.0	1	n/a	JLCPCB, 3D printing (MJF), PA12-HP Nylon
PORON	4	n/a	78mm x 2.5mm (t=1.5mm)
PORON	4	n/a	59mm x 2.5mm (t=1.5mm)
Screw M2 5mm	1	n/a	Hirosugi B-0205
Screw M2 8mm	4	n/a	Hirosugi B-0208
Insert nut M2	4	n/a	Hirosugi HSB-203030Z
Nut M2	1	n/a	Hirosugi BNT-02-2
Washer M2	1	n/a	Hirosugi BW-0243-03
30pF 0402	2	C15, C16	PCBA	C1570
100nF 0402	10	C5-14	PCBA	C307331
1uF 0402	2	C3, C4	PCBA	C52923
10uF 0402	2	C1, C2	PCBA	C15525
1N4148WS	12	D1-12 [2]	PCBA	C2128
HRO_TYPE-C-31-M-12	1	J1	PCBA, USB Connector (Type-C)	C165948
JUSHUO_AFC01-S12FCC-00	2	J2, J3 [2]	PCBA, FFC Connector (0.50mm pitch, 12 circuits)	C262268
27Ω 0402	2	R3, R4	PCBA	C352446
1KΩ 0402	2	R7, R8	PCBA	C11702
5.1KΩ 0402	2	R1, R2	PCBA	C25905
10KΩ 0402	2	R5, R6	PCBA	C25744
AP2112K-3.3	1	U1	PCBA	C51118
Raspberry Pi RP2040	1	U2	PCBA	C2040
W25Q64JVSSIQ	1	U3	PCBA	C179171
12MHz Crystal Resonator SMD-3225	1	Y1	PCBA, YSX221SL	C9002
SKRPANE010	2	SW21, SW22	PCBA, Alps Alpine tactile switch	C470426
WS2812C-2020-V1	1	LED1 [1]	PCBA, NeoPixel	C2976072

MEMO: [1] To reduce costs, I did not assemble LED1 with PCBA. MEMO: [2] Can be replaced with upgrade parts.

Upgrade parts:

Material	Unit	Designator	Note	JLCPCB Part #
Octave Input LED PCB rev.1.0.0	1	n/a	JLCPCB
CPG151101S11-2	12	SW1-12	Kailh®︎ hot swap socket (White)
1N4148WS	12	D1-12	PCBA	C2128
JUSHUO_AFC01-S12FCC-00	1	J3	PCBA, FFC Connector (0.50mm pitch, 12 circuits)	C262268
WS2812B-Mini-V3	12	LED201-0212	NeoPixel

• Octave CPU PCB rev.6.1.3, Octave Input PCB rev.6.1.3 (PCBA)

  

• Octave Input LED PCB rev.1.0.0 (Upgrade)

  

• Octave Plate rev.1.0.3

  

• Assembly

  

Software

• Software

History

• [Closed] prototype-2
• [Closed] prototype-1

License

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