2 layers133 × 133 mm
2 layers133 × 133 mm
Fercus left
Dachtire/fercus35Wireless low profile optical switch split keyboard
- Size
- 133 × 133 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 272
- Nets
- 115
- Pads
- 774
- Tracks, vias
- 1,490, 671
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 21 Jul 2022
- Updated
- 15 Sep 2026
Overview
Fercus left is an open-source printed circuit board by Dachtire, from the Dachtire/fercus repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 133 × 133 mm with 272 parts on 115 nets, routed with 1,490 tracks and 671 vias.
It is built around the CH32V208CBU6, ETA9084E10 and XC6206P332MR, with the BSS138 and AFH34-S06FIA-1H among its other parts. Its parts include 52 transistors, 49 switches, 48 resistors, 43 diodes and 38 capacitors. It belongs with the keyboards and input boards and the RISC-V boards of this library.
Main components
5
CH32V208CBU6
QFN-48(5x5)QFN-48(5x5) Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
ETA9084E10
ESSOP10Translators, Level Shiftersetasolution
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
AFH34-S06FIA-1H
SMD,P=0.5mm,卧贴FFC, FPC (Flat Flexible) Connector AssembliesJUSHUO
Parts
272| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | KTR-0602IRC-850 | chulaine:KTR-0602IRC | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 42 | KTR-0602PTD | chulaine:KTR-0602PTD | Q1, Q2, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19, Q20, Q21, Q22, Q23 +26 |
| 42 | SW_LPO | chulaine:SW_RAESHA_Low_Profile_Optical | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +26 |
| 28 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C10, C11, C13, C21, C22, C23, C24, C25, C26, C31, C32, C33, C34, C35 +12 |
| 21 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23, TP24 +5 |
| 14 | 75R | Resistor_SMD:R_0603_1608Metric | R15, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34 |
| 12 | 100kR | Resistor_SMD:R_0603_1608Metric | R38, R39, R41, R43, R46, R48, R50, R52, R54, R56, R58, R60 |
| 10 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q43, Q44, Q45, Q46, Q47, Q48, Q49, Q50, Q51, Q52 |
| 7 | 10kR | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8, R9, R40, R44 |
| 6 | 1kR | Resistor_SMD:R_0603_1608Metric | R16, R17, R18, R19, R20, R21 |
| 6 | SW_Push | chulaine:SW_SPST_TL3342 | SW43, SW44, SW45, SW46, SW47, SW48 |
| 4 | 5.1kR | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 4 | Fiducial | Fiducial:Fiducial_1mm_Mask3mm | FID1, FID2, FID3, FID4 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2_ISO14580_Pad | H1, H2, H3, H4 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C6, C18, C20 |
| 2 | 1.8pF | Capacitor_SMD:C_0402_1005Metric | C5, C9 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric | R11, R12 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C14, C15 |
| 2 | USB_C_Receptacle_USB2.0 | chulaine:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1, J2 |
| 1 | 1.8nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C19 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 150R | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 2.2uH | chulaine:L_Sunlord_MWSA0402S | L2 |
| 1 | 2.49kR | Resistor_SMD:R_0402_1005Metric | R37 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 30kR | Resistor_SMD:R_0603_1608Metric | R35 |
| 1 | 32.768kHz | chulaine:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz | chulaine:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AFH34-S06FIA-1H | chulaine:Jushuo_AFC42-S06FMA-1H_1x6-1MP_P0.50_Horizontal | J3 |
| 1 | Antenna_Shield | wch-ant:WCH_MIFA-1_2.4G_1.6mm_FR4_Left_NoMask | AE1 |
| 1 | CH32V208CBU6 | chulaine:QFN-48-1EP_5x5mm_P0.35mm_EP3.7x3.7mm_ThermalVias_Drill0.3mm_WCH | U2 |
| 1 | ETA9084E10 | chulaine:SSOP-10-1EP_3.9x4.9mm_P1.00mm_EP2.4x2.8mm_ThermalVias_Drill0.3mm | U3 |
| 1 | LED_RABG | chulaine:Everlight_LED_RGB_PLCC-4 | D43 |
| 1 | Molex_PicoBlade_53261-0371_1x03-1MP_P1.25mm_Horizontal | Connector_Molex:Molex_PicoBlade_53261-0371_1x03-1MP_P1.25mm_Horizontal | J5 |
| 1 | SW_SPDT | chulaine:SW_SPDT_PCM12_Vertical | SW49 |
| 1 | Thermistor_NTC | Resistor_SMD:R_0603_1608Metric | TH1 |
| 1 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23-3 | U1 |
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Questions
How big is the Fercus left PCB?
It measures 133 × 133 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Fercus left use?
272 parts, built around the CH32V208CBU6, ETA9084E10, XC6206P332MR and BSS138. 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 Fercus left KiCad files?
From the Dachtire/fercus repository on GitHub, at the commit this page was made from: the board is hardware/pcb/fercus-left/fercus-left.kicad_pcb and its schematic hardware/pcb/fercus-dongle-usb-a/fercus-dongle.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fercus left 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).