2 layers135.8 × 86.3 mm
Shobo right
krikun98/Shobo
Wireless split keyboard built around Framework One Key modules
52 parts2CERN-OHL-P-2.0
2 layers188.9 × 83.9 mm
Willis
krikun98/Willis10Wireless PCB for Bruce the Keyboard
- Size
- 188.9 × 83.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 114
- Nets
- 93
- Pads
- 428
- Tracks, vias
- 1,213, 143
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Aug 2024
- Updated
- 24 Nov 2024
Overview
Willis is an open-source printed circuit board by krikun98, from the krikun98/Willis repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 188.9 × 83.9 mm with 114 parts on 93 nets, routed with 1,213 tracks and 143 vias.
It is built around the TP4054, USBLC6-2SC6 and AO3407, with the BSD3C051V among its other parts. Its parts include 40 diodes, 40 switches, 7 resistors, 5 capacitors and 5 connectors. It belongs with the keyboards and input boards of this library.
Main components
4
TP4054
SOT-23-5L-40℃~+85℃ 1 25uA 4.2V 4.2V~6.5V 500mA Charging IC Lithium Battery Not supported 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 SOT-23-5L Battery Management ROHSUMWBattery Management
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)
AO3407
SOT-23-55℃~+150℃ 1 P-Channel 1.4W 1V 260pF 30V 37pF 4.1A 75mΩ@4.5V P-Channel ±20V SOT-23 MOSFETs ROHSBORNMOSFETs
BSD3C051V
SOD-32316A@8/20us 1uA 20V 350W@8/20us 5V 60pF 6V Bidirectional IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Single-channel TVS SOD-323 ESD and Surge Protection (TVS/ESD) ROHSBORNESD And Surge Protection (TVS/ESD)
README
README.mdWillis
The Willis is a wireless ZMK PCB for whydobearsxplod and jlw's Bruce the Keyboard.
It is licensed under the permissive CERN-OHL-P v2.
Features
- Wireless with a built-in E73 module
- ZMK support via a module
- Fuses and ESD protection
- High Voltage mode for the best power efficiency
- Soldered MX 34- or 36-key layouts
- Meant for 431575 450 mAh battery in the PCB hole
- Externally accessible soft_off and reset buttons
- Math-generated silkscreen
- Is a keyboard
- Very much is not a human.
Download
You can download Gerber files in the releases section.
Instructions
Firmware
The bootloader is available in the Releases tab. Please refer to Joric's nrfmicro wiki for the flashing instructions. It's the same as the nrfmicro bootloader with a modified USB device name.
Default firmware files for the 34-key layout are also there. You can use the Willis config template for customization. The firmware supports ZMK Studio.
Miryoku is strongly recommended.
BOM/Build instructions
The interactive BOM is available next to the PCB files.
Please refer to the nrfmicro wiki for soldering/verification instructions.
Links
Version 0.3 PCB
| front | back |
|---|---|
 |  |
Cases/plates
Willis is fully compatible with plates/cases for the original Bruce.
Plate files are also available in the Bruce resources repository.
Willis-specific cases with button/battery cutouts:
- seirin-blu's Willis the MFR2
- Ha Ha Ha's Humane Willis
TODO
- BOM with links
- Test/fix PCBA files
Parts
114| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | KEYSW | PCM_marbastlib-mx:SW_MX_1u | K1, K2, K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K20, K21, K22, K23 +22 |
| 36 | D_Small | Diode_SMD:D_SOD-323_HandSoldering | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +20 |
| 4 | MountingHole | kbd:M2_Hole_TH_mod | H1, H2, H3, H4 |
| 2 | 12pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C4 |
| 2 | 1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R6 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C5 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | HPZ1608U121 | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L1, L2 |
| 2 | SW_PUSH | Button_Switch_SMD:SW_SPST_EVQP7C | RSW1, RSW2 |
| 2 | Stabilizer | PCM_marbastlib-mx:STAB_MX_P_2u | S1, S2 |
| 1 | 100K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 10uH | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L3 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 1N5819 | Diode_SMD:D_SOD-323_HandSoldering | D40 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_MicroCrystal_CM9V-T1A-2Pin_1.6x1.0mm_HandSoldering | X1 |
| 1 | 3K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | AO3407 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1 |
| 1 | BLUE | LED_SMD:LED_1206_3216Metric_ReverseMount_Hole1.8x2.4mm | D37 |
| 1 | BSD3C051V | Diode_SMD:D_SOD-323_HandSoldering | D38 |
| 1 | Battery | kbd:Battery_TH | J2 |
| 1 | Battery JST | Connector_JST:JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | J4 |
| 1 | E73-2G4M08S1C-52840 | kbd:E73-2G4M08S1C-52840 | U3 |
| 1 | LOGO | Silks:willis_truchet | G*** |
| 1 | RED | LED_SMD:LED_1206_3216Metric_ReverseMount_Hole1.8x2.4mm | D39 |
| 1 | SWD | kbd:connector_swd_REV | J1 |
| 1 | TC2030_SWD | PCM_marbastlib-various:CON_TC2030_outlined | J5 |
| 1 | TP4054 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U1 |
| 1 | USB-C Conn | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J3 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:TSOT-23-6_HandSoldering | U2 |
The 113 most common of 114 parts.
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Questions
How big is the Willis PCB?
It measures 188.9 × 83.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Willis use?
114 parts, built around the TP4054, USBLC6-2SC6, AO3407 and BSD3C051V. 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 Willis KiCad files?
From the krikun98/Willis repository on GitHub, at the commit this page was made from: the board is pcb/willis.kicad_pcb and its schematic pcb/willis.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Willis design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).