2 layers228.4 × 85 mm
Le chiff ble
MangoIV/le_chiff_ble
A drop-in replacement-PCB for the beautiful le_chiffre
117 parts52GPL-3.0
2 layers230 × 85 mm
Le chiff ble hotswap
MangoIV/le_chiff_ble52A drop-in replacement-PCB for the beautiful le_chiffre
- Size
- 230 × 85 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 117
- Nets
- 90
- Pads
- 488
- Tracks, vias
- 1,131, 206
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 14 Jun 2021
- Updated
- 15 Feb 2024
Overview
Le chiff ble hotswap is an open-source printed circuit board by MangoIV, from the MangoIV/le_chiff_ble repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 230 × 85 mm with 117 parts on 90 nets, routed with 1,131 tracks and 206 vias.
It is built around the MS88SF2, DW01A and FS8205, with the TP4056, USBLC6-2SC6 and AO3401A among its other parts. Its parts include 38 diodes, 15 resistors, 11 capacitors, 6 ICs and 3 switches. It belongs with the keyboards and input and radio and wireless boards of this library.
Main components
6MS88SF2
SMD,17.4x23.2mmSMD,17.4x23.2mm Bluetooth Modules ROHSMINEWBluetooth Modules
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementFS8205
SOT-23-6-55℃~+150℃ 1.2V 1W 2 N-Channel 20V 37mΩ@2.5V 6A N-Channel SOT-23-6 MOSFETs ROHSFORTUNEMOSFETs
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 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 ESOP-8 Battery Management ROHSUMWBattery ManagementUSBLC6-2SC6
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)
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.mdle_chiff_ble
What is this?
This is a drop-in replacement PCB for tominabox1's Le Chiffre keyboard, one of my all time favourite boards. I redesigned the existing PCB from top up and added bluetooth. Please be so kind and check out the original repo and leave a star. This is where you can also find case files for this PCB.
Some of the footprints are not taken from the standard kicad libraries, huge thanks to foostan for making the awesome "kbd" library and to ai03 for their super nice footprint libraries, the minew symbol and footprints are by oreore.
All graphics on my PCB are hand drawn and belong to no-one but me.
There are two PCBs in this repo one
- with hotswap, no silkscreen, see kicad/le_chiff_ble_hotswap
- without hotswap, with silkscreen, see kicad/le_chiff_ble
I do not take any responsibility for what you do with the files supplied here in any way. Neither do I guarantee they're working for whatever purpose you intend ot use them.
State of the project
implemented
- charging circuit is working
- MCU connects via bluetooth and USB
- all features have been tested and are working, including OLED and Encoder
- a working zmk firmware can be found here.
open tasks
- the widgets in zmk for the OLED are still very basic, I'd like to do something to make them look better, this will be added after I finished and uploaded the firmware
How can I obtain one
- Gerbers are supplied, be free to order them from the PCB manufacturer you prefer.
you will need parts:
- Resistors, footprint is 0805:
- 1x 2M
- 1x 1M
- 1x 806k
- 1x 100k
- 2x 5.1k
- 1x 1.8k
- 3x 1k
- 2x 100
- 1x 2.1
- Capacitors, footprint is 0805
- 4x 10uF
- 2x 1uF
- 2x 0.1uF
- 1x 1nF
- Diodes
- 35x SOD123 for the switches and encoder
- 1x Schottky, SOD323, should be low voltage drop
- either 2x in switch LEDs or 2x 0805 SMD LEDs for the charging indicator
- 1x PMOS, A03401A
- 1x battery management chip, TP4056, footprint is SOP-8-PP
- 1x LDO, XC6206PxxMR
- 1x usblc6, footprint is sot-23-6
- 1x 500mA Fuse, footprint is 1206/ 3216Metric
- 1x battery protection IC DW01A, footprint is sot-23-6
- 1x two nmos with gates connects FS8205, footprint is sot-23-6
- 1x Minew MS88SF2, be careful to choose the version with nrF52840, there's also another version with the same name which won't work
- 1x USB type c port, 12 pin
- 1x MSK-12C02 smd toggle switch
- 1x SW SPST TL3342 push switch for reset
- 34-35 MX/alps/choc switches depending on whether you use the encoder or not
- Battery connector with 1.25mm pitch, choose whichever you're fine with
- optional: 1x Encoder, 1x 128x32 OLED
How do I build one?
- solder all components
- flash bootloader (I liked this one a lot, it's fairly easy to modify to your needs, e.g. the name the board will appear with in bootloader mode)
- plug into PC and test whether everything is working, flash Firmware
- the firmware can be forked from here, just adjust the
.keymapfile, push, let GitHub Actions build it for you, download, done - plug in battery, plug in PC again to unlock DW01A (this needs to be done everytime you physically disconnect the PCB from the battery)
- be careful to adjust resistor value of the tp4056 when you take different battery sizes, I chose 1Ah which works fine with the specified resistor values
- verify charging and bluetooth works
- continue building as if this was a "normal" chiffre
Parts
117| Qty | Value | Footprint | References |
|---|---|---|---|
| 35 | D_Small | Diode_SMD:D_SOD-123 | D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25 +19 |
| 34 | MX_LED | weteor:CherryMX_Hotswap | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +18 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C5, C8 |
| 3 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R4, R12 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R5, R10 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric | C6, C9 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric | R9, R11 |
| 2 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R13, R14 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 1.8k | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C10 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | 1nF | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 2M | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 2R2 | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 806k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BL_CONN | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | Battery_Cell | Connector_Molex:Molex_PicoBlade_53048-0210_1x02_P1.25mm_Horizontal | BT1 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | D_Schottky_Small | Diode_SMD:D_SOD-323_HandSoldering | D3 |
| 1 | FS8205 | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | HRO-TYPE-C-31-M-12 | Keebio-Parts:HRO-TYPE-C-31-M-12-Assembly | USB1 |
| 1 | LOGO | dreipunkteinsvier:ChurchOfChiffre40mm | G*** |
| 1 | MS88SF2 | ms88sf2_oreore:MINEW_MS88SF2 | U2 |
| 1 | MX_LED | PCM_0xcb:SW_Cherry_MX_PCB_1.00u | MX35 |
| 1 | OLED | kbd:OLED_1side | OL1 |
| 1 | ON_OFF | other_parts:switch_MSK-12C02_smd | SW1 |
| 1 | Rotary_Encoder_Switch | Keebio-Parts:RotaryEncoder_EC11-no-legs | SW3 |
| 1 | SW_RESET | Button_Switch_SMD:SW_SPST_TL3342 | SW2 |
| 1 | TP4056 | lib:TP4056_SOP-8-PP | U1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | XC6206PxxxMR-Regulator_Linear | Package_TO_SOT_SMD:SOT-23 | U3 |
| 1 | gween | Diode_SMD:D_0805_2012Metric | D1 |
| 1 | oragne | Diode_SMD:D_0805_2012Metric | D2 |
The 115 most common of 117 parts.
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Questions
How big is the Le chiff ble hotswap PCB?
It measures 230 × 85 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Le chiff ble hotswap use?
117 parts, built around the MS88SF2, DW01A, FS8205 and TP4056. 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 Le chiff ble hotswap KiCad files?
From the MangoIV/le_chiff_ble repository on GitHub, at the commit this page was made from: the board is kicad/le_chiff_ble_hotswap/le_chiff_ble_hotswap.kicad_pcb and its schematic kicad/le_chiff_ble_hotswap/le_chiff_ble_hotswap.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Le chiff ble hotswap design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).