2 layers209.8 × 147 mm
Kicad miao panel
kilipan/miao
A cheap and hand-solderable drop-in replacement for the XIAO using ch552t
2,645 parts33CERN-OHL-S-2.0
2 layers193.5 × 116.6 mm
Butterfly
ThePurox/Hexapoda13The electronic design is inspired by the MIAO MCU board.
- Size
- 193.5 × 116.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 59
- Pads
- 327
- Tracks, vias
- 693, 255
- Pours
- 17
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 24 May 2024
- Updated
- 27 Nov 2024
Overview
Butterfly is an open-source printed circuit board by ThePurox, from the ThePurox/Hexapoda repository on GitHub. It is a 2-layer board of 193.5 × 116.6 mm with 67 parts on 59 nets, routed with 693 tracks and 255 vias.
It is built around the USBLC6-2SC6, BAV70 and PMEG2010EA. Its parts include 32 switches, 16 diodes, 3 resistors, 2 capacitors and 2 ICs.
Main components
3
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
BAV70
SOT-23-55℃~+150℃ 1 Pair Common Cathode 1.25V@150mA 2.5uA@70V 200mA 225mW 2A 6ns 70V SOT-23 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
PMEG2010EA
SOD-3231 Independent 1A 20V 50uA@15V 550mV@1A 5A SOD-323 Schottky Diodes ROHSNexperiaSchottky Diodes
README
readme.mdHexapoda
The Hexapoda is a hummingbird style 30 key keyboard designed around hexagonal keycaps, which require Choc v1 switches.
It uses the CH552T controller and FAK firmware.
The electronic design is inspired by the MIAO MCU board.
Buildguide
Soldering should be straight forward with the help of the interactive bill of materials
The orientation of U1 and U2 are indicated by small arrows on the PCB.
The orientaion D16 is such that its white line is on the side where the footprint on the silkscreen also has a white line.
For all other components, the orientation does not matter, or their form-factor allows only one orientation (D1-D15).
Make sure to also solder the metal legs on the side, as they will give stability to the jack.
Do not plug in a USB-cabel without soldering the metal legs on the side of the USB-jack! You will most likely rip off the USB-jack when unplugging the USB-cable!
Flashing firmware
This keyboard is designed for the FAK-firmware.
I've provided some example configuration files in my fork of the fak-config repository with the keyboard name hexapoda.
The push-button closer to the USB-jack is the BOOT button. The one closer to the thumb keys is the RESET button.
BOM
| Part | LCSC-Part Nr | amount |
|---|---|---|
| USB-C | C2765186 | 1 |
| CH552T | C111367 | 1 |
| BAV70 Diodes | C727123 | 15 |
| USBLC6-2SC6 | C6807798 | 1 |
| PMEG2010EA | C193668 | 1 |
| Push buttons | C115357 | 2 |
| Fuse | C311055 | 1 |
| 5.1k-Resistor | C23186 | 2 |
| 10k-Resistor | C25804 | 1 |
| 1uF-Capacitor | C2991434 | 2 |
| Hot-Swap-Sockets | 30 | |
| Choc V1 Switches | 30 |
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | PG1350 | s-ol:PG1350_hotswap_naked | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +14 |
| 15 | BAV70 | silklesspretty:SOT-23 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15 |
| 6 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4, H5, H6 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 500mA | Fuse:Fuse_0603_1608Metric_Pad1.05x0.95mm_HandSolder | F1 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | G*** | kibuzzard-6704E2E6 | kibuzzard-6704E2E6 |
| 1 | PMEG2010EA | Diode_SMD:D_SOD-323_HandSoldering | D16 |
| 1 | RESET | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW2 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | ~ | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
The 66 most common of 67 parts.
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Questions
How big is the Butterfly PCB?
It measures 193.5 × 116.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Butterfly use?
67 parts, built around the USBLC6-2SC6, BAV70 and PMEG2010EA. 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 Butterfly KiCad files?
From the ThePurox/Hexapoda repository on GitHub, at the commit this page was made from: the board is butterfly.kicad_pcb and its schematic butterfly.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Butterfly design in my own project?
Its repository states no licence, so its author keeps all rights: ask ThePurox before reusing the design.