4 layers71.9 × 94 mm
Thumbdeck right
neuman/gripster
thumbdeck — wireless split thumb keyboard (nRF52840 + ZMK, BLE split, i8+-inspired). Layout converged & graded PASS.
114 parts11Apache-2.0
2 layers139.3 × 72.4 mm
Chocofi PCB
wallago/chocofi-PCBKiCad PCB design for the chocofi, a 34-key wireless split keyboard
- Size
- 139.3 × 72.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 73
- Pads
- 315
- Tracks, vias
- 369, 35
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 May 2026
- Updated
- 23 Jul 2026
Overview
Chocofi PCB is an open-source printed circuit board by wallago, from the wallago/chocofi-PCB repository on GitHub. It is a 2-layer board of 139.3 × 72.4 mm with 63 parts on 73 nets, routed with 369 tracks and 35 vias.
It is built around the E73-2G4M08S1C, 1N4148WS and AO3401A, with the AP2112K-3.3 and USBLC6-2SC6 among its other parts. Its parts include 18 diodes, 18 switches, 10 capacitors, 5 resistors and 2 connectors. It belongs with the keyboards and input boards of this library.
Main components
5
E73-2G4M08S1C
SMD,18x13mm-103dBm、-95dBm -40℃~+85℃ 120m 17.05mA 3.3V 8.27mA 8dBm Bluetooth 5.0、Bluetooth 4.2 PWM、SPI、ADC、USB、I2C、ISP、JTAG、DMA nRF52840 Chip SMD,18x13mm Bluetooth Modules ROHSChengdu Ebyte Elec TechBluetooth Modules
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
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
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
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)
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2, D3, D4, D5, D6, D7, D10, D11, D12, D13, D14, D15, D16, D17, D18 +2 |
| 18 | SW_Push | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_Choc_V2_Plated | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18 +2 |
| 4 | C (100nF) | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C100nF, C100nF, C100nF, C100nF |
| 3 | C (4.7µF) | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4.7µF, C4.7µF, C4.7µF |
| 2 | C (1µF) | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1µF, C1µF |
| 2 | R (5.1k) | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5.1k, R5.1k |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | AO |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | AP |
| 1 | C (10µF) | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10µF |
| 1 | Conn_01x02_Pin (battery) | Connector_JST:JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | BAT |
| 1 | Conn_01x02_Pin (switch) | Connector_JST:JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | SWITCH |
| 1 | Conn_01x03_Pin | Connector_JST:JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J4 |
| 1 | D_Schottky | Diode_SMD:D_SOD-323 | Schottky |
| 1 | E73-2G4M08S1C | E73-2G4M08S1C:E73-2G4M08S1C | U1 |
| 1 | LED | LED_SMD:LED_0201_0603Metric_Pad0.64x0.40mm_HandSolder | LED |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | MCP |
| 1 | R (100k) | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R100k |
| 1 | R (470) | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R470 |
| 1 | R (5k) | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5.1k |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | RST |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | USBLC |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_Amphenol_12401948E412A | J1 |
Questions
How big is the Chocofi PCB PCB?
It measures 139.3 × 72.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Chocofi PCB use?
63 parts, built around the E73-2G4M08S1C, 1N4148WS, AO3401A and AP2112K-3.3. 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 Chocofi PCB KiCad files?
From the wallago/chocofi-PCB repository on GitHub, at the commit this page was made from: the board is test.kicad_pcb and its schematic test.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Chocofi PCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask wallago before reusing the design.
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