2 layers78.1 × 61 mm
4 layers88.5 × 33.8 mm
- Size
- 88.5 × 33.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 78
- Pads
- 233
- Tracks, vias
- 440, 79
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Oct 2026
- Updated
- 1 Oct 2026
Overview
Foba is an open-source printed circuit board by MarvinAnner, from the MarvinAnner/Foba_PCB repository on GitHub. It is a 4-layer board of 88.5 × 33.8 mm with 58 parts on 78 nets, routed with 440 tracks and 79 vias.
It is built around the STM32F107RBT6, LM2596S-3.3 and KF301-5.0-2P, with the HY931147C, LAN8720A-CP and SS56 among its other parts. Its parts include 20 capacitors, 18 resistors, 6 ICs, 2 diodes and 1 transistor. It belongs with the STM32 boards of this library.
Main components
7
STM32F107RBT6
LQFP-64(10x10)-40℃~+85℃ 128KB 12bit 12bit 2V~3.6V 32 Bit 51 64KB 72MHz ARM Cortex-M3 Built-in FLASH LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
LM2596S-3.3
TO-263-5L-20℃~+70℃ 1 170kHz 2mA 3.3V 3A 4.5V~40V Buck Buck Built-in Fixed No TO-263-5L DC-DC Converters ROHSGRDC-DC Converters
KF301-5.0-2P
插件,P=5mm-30℃~+120℃ 1 1.5 14~22 17A 1x2P 2 250V 2P 5mm Blue Through Hole 插件,P=5mm Screw Terminal Blocks ROHSCixi Kefa ElecScrew Terminal Blocks
HY931147C
插件1 RJ45 Jack Right Angle Shielded With Contact Spring With LED With PoE 插件 Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSHANRUNEthernet Connectors / Modular Connectors (RJ45 RJ11)
LAN8720A-CP
QFN-24-EP(4x4)Ethernet ICsMicrochip Technology
SS56
SMA(DO-214AC)Schottky Diodeshongjiacheng
7B025000M01
SMD3225-4P12pF 25MHz Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSHDCrystals
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C4, C13, C14, C15, C16, C17, C19 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R10, R11, R12, R14, R15 |
| 5 | ~ | Connector_Pin:Pin_D0.7mm_L6.5mm_W1.8mm_FlatFork | TP1, TP2, TP3, TP4, TP5 |
| 4 | 100n | Capacitor_SMD:C_0402_1005Metric | C5, C6, C10, C12 |
| 4 | 49.9 | Resistor_SMD:R_0402_1005Metric | R4, R5, R6, R7 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R18 |
| 2 | 15p | Capacitor_SMD:C_0603_1608Metric | C7, C11 |
| 2 | 270 | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1, FB2 |
| 2 | KF301-5.0-2P | KF301-5.0-2P:KF301-5.0-2P | U1, U3 |
| 2 | SS56 | SS56:SS56 | D1, D2 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R17 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R16 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C20 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 220u | Capacitor_SMD:C_Elec_3x5.4 | C3 |
| 1 | 33 | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | 33u | Inductor_SMD:L_Bourns_SRP7028A_7.3x6.6mm | L1 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C18 |
| 1 | 470p | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 470u | Capacitor_SMD:CP_Elec_8x10 | C2 |
| 1 | 7B025000M01 | lcsc_footprints:C654997_CRYSTAL-SMD_4P-L3_2-W2_5-BL | X1 |
| 1 | AOD4184A_C5370959 | AOD4184A:AOD4184A | Q1 |
| 1 | Conn_01x05_MountingPin | Connector_PinHeader_1.00mm:PinHeader_1x05_P1.00mm_Vertical | J1 |
| 1 | HY931147C | HY931147C:HY931147C | U4 |
| 1 | LAN8720A | Package_DFN_QFN:VQFN-24-1EP_4x4mm_P0.5mm_EP2.5x2.5mm_ThermalVias | U5 |
| 1 | LM2596S-3.3 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U2 |
| 1 | STM32F107RCT6TR | STM32F107RBT6:STM32F107RBT6 | U6 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_E-Switch_TL3301NxxxxxG | SW1 |
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Questions
How big is the Foba PCB?
It measures 88.5 × 33.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Foba use?
58 parts, built around the STM32F107RBT6, LM2596S-3.3, KF301-5.0-2P and HY931147C. 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 Foba KiCad files?
From the MarvinAnner/Foba_PCB repository on GitHub, at the commit this page was made from: the board is Foba.kicad_pcb and its schematic Foba.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Foba design in my own project?
Its repository states no licence, so its author keeps all rights: ask MarvinAnner before reusing the design.