2 layers120 × 66.5 mm
4 layers62 × 42.5 mm
STM Board
Nyaigoti/STM-Board- Size
- 62 × 42.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 88
- Pads
- 252
- Tracks, vias
- 320, 36
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 26 Feb 2026
- Updated
- 14 Mar 2026
Overview
STM Board is an open-source printed circuit board by Nyaigoti, from the Nyaigoti/STM-Board repository on GitHub. It is a 4-layer board of 62 × 42.5 mm with 52 parts on 88 nets, routed with 320 tracks and 36 vias.
It is built around the CP2102, TPS63802DLAR and AT24C128C-SSHM-B, with the MCP73831 among its other parts. Its parts include 18 capacitors, 12 resistors, 5 ICs, 4 connectors and 3 diodes. It belongs with the STM32 boards of this library.
Main components
4
CP2102
-Non-isolated TYPE-A UART(TTL) USB2.0 - USB Conversion Modules ROHSAi-ThinkerUSB Conversion Modules
TPS63802DLAR
VSON-10(2x3)-40℃~+125℃@(TJ) 1 1.3V~5.5V 1.4MHz、1.6MHz、2.1MHz 1.8V~5.2V 11uA 2A Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-10(2x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
AT24C128C-SSHM-B
SOIC-8-40℃~+125℃ 1,000,000 cycles 100 Years 128Kbit 2.5V~5.5V 400kHz 5ms Hardware write protection function、Noise suppression function、Built-in power-on reset (POR) I2C SOIC-8 EEPROM ROHSMicrochip TechnologyEEPROM
MCP73831
UncategorisedMicrochip Technology
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_1206_3216Metric | C2, C3, C10, C11, C12, C13, C14 |
| 4 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C4, C5, C6, C9 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2_Pad_TopBottom | H1, H2, H3, H4 |
| 3 | LED | LED_SMD:LED_01005_0402Metric | D1, D2, D3 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R5 |
| 2 | 1k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10 |
| 2 | 2k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8 |
| 2 | 30p | Capacitor_SMD:C_1206_3216Metric | C15, C16 |
| 2 | Conn_01x08_Pin | Connector_PinHeader_2.00mm:PinHeader_1x08_P2.00mm_Vertical | J2, J3 |
| 1 | 0.47uH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | 100n | Capacitor_SMD:C_1206_3216Metric | C17 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 10p | Capacitor_SMD:C_1206_3216Metric | C18 |
| 1 | 10uF | Capacitor_SMD:C_1206_3216Metric | C7 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 1k5 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 1uF | Capacitor_SMD:C_1206_3216Metric | C1 |
| 1 | 22uF | Capacitor_SMD:C_1206_3216Metric | C8 |
| 1 | 2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 560k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 8MHz | C3E-8.000-18-1020-X-R:XTAL_C3E-8.000-18-1020-X-R | Y1 |
| 1 | AT24C128C | AT24C128C-SSHM-B:SOIC127P600X175-8N | U5 |
| 1 | BOOT0 | Button_Switch_SMD:Nidec_Copal_CAS-120A | SW3 |
| 1 | Battery Connector | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1 |
| 1 | CP2102 | CP2102:QFN50P500X500X100-29N | U1 |
| 1 | MCP73831 | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mm | U2 |
| 1 | STM32F030C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U4 |
| 1 | SW2 | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxJ | RST1 |
| 1 | SW4 | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxJ | USER1 |
| 1 | SW_SPDT | Button_Switch_SMD:Nidec_Copal_CAS-120A | SW1 |
| 1 | TPS63802DLAR | TPS63802DLAR:VREG_TPS63802DLAR | U3 |
| 1 | USB_C | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | P1 |
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Questions
How big is the STM Board PCB?
It measures 62 × 42.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the STM Board use?
52 parts, built around the CP2102, TPS63802DLAR, AT24C128C-SSHM-B and MCP73831. 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 STM Board KiCad files?
From the Nyaigoti/STM-Board repository on GitHub, at the commit this page was made from: the board is STM Board.kicad_pcb and its schematic STM Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STM Board design in my own project?
Its repository states no licence, so its author keeps all rights: ask Nyaigoti before reusing the design.