Board
About the Board
Board is an open source STM32 PCB design by myhomecan, published on GitHub. It is a 2-layer board measuring 32 × 96 mm, with 89 components from 50 distinct parts.
Its main chip is the STM32F103C_QFP48, from the STM32 family. Other key parts include the MP2451, AMS1117-3.3 and TJA1050. By type, the board carries 27 resistors, 16 capacitors, 15 connectors, 5 transistors, 4 ICs and 3 diodes.
Main components on the Board
Board bill of materials (BOM)
89 components, 50 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MP2451 | SOT-23-6 | U1 |
| 1 | AMS1117-3.3 | SOT-223 | U2 |
| 1 | STM32F103C_QFP48 | LQFP-48_7x7mm_Pitch0.5mm | U3 |
| 1 | TJA1050 | SOIC-8_3.9x4.9mm_Pitch1.27mm | U4 |
| 1 | Q_PNP_BEC | SOT-23 | Q1 |
| 4 | Q_NPN_BEC | SOT-23 | Q2, Q3, Q4, Q5 |
| 1 | EPWR | Pin_Header_Straight_1x06 | P1 |
| 1 | BUS | bornier4 | P2 |
| 1 | EXT1b | Pin_Header_Straight_1x10_Pitch1.27mm | P2-3 |
| 1 | EXT2b | Pin_Header_Straight_1x10_Pitch1.27mm | P2-5 |
| 2 | I2C | Pin_Header_Straight_1x4_Pitch1.27mm | P2-8, P8 |
| 2 | UART1 | Pin_Header_Straight_1x4_Pitch1.27mm | P2-10, P10 |
| 1 | EXT1 | Pin_Header_Straight_1x10_Pitch1.27mm | P3 |
| 1 | OW | bornier3 | P4 |
| 1 | EXT2 | Pin_Header_Straight_1x10_Pitch1.27mm | P5 |
| 1 | UART2 | Pin_Header_Straight_1x03 | P6 |
| 1 | RF | Pin_Header_Straight_2x05 | P7 |
| 1 | SWD | Pin_Header_Straight_1x4_Pitch1.27mm | P9 |
| 1 | CONN_01X06 | Pin_Header_Straight_1x06 | P11 |
| 1 | SST25VFXX | SOIC-8_3.9x4.9mm_Pitch1.27mm | DD1 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | CONN_02X10 | Pin_Header_Straight_2x12 | PARR1, PARR5 |
| 2 | CONN_02X10 | Pin_Header_Straight_2x08 | PARR2, PARR4 |
| 1 | CONN_02X10 | Pin_Header_Straight_2x10 | PARR3 |
| 4 | 4x1k | R_Array_Convex_4x0402 | RP1, RP2, RP3, RP4 |
| 2 | 4x510 | R_Array_Convex_4x0402 | RP5, RP6 |
| 1 | R_PACK4 | R_Array_Convex_4x0402 | RP7 |
| 1 | CONN_02X04 | SOIC-8-N | SO81 |
| 4 | CONN_02X04 | SOT-23-6 | SOT1, SOT2, SOT3, SOT231 |
| 1 | D_Schottky | SOD-123 | D1 |
| 1 | 5V1 | SOD-123 | D2 |
| 1 | 3V6 | SOD-123 | D3 |
| 1 | Ihlp2525czer6r8m01 6.8UH | Choke_SMD_6.3x6.3_H3 | L1 |
| 1 | 33pF | C_0805 | C1 |
| 12 | 0.1uF | C_0805 | C2, C3, C5, C6, C8, C9, C11, C12 +4 |
| 1 | 22uF | TantalC_SizeC_EIA-6032_Reflow | C4 |
| 2 | 4.7uF | C_1206 | C7, C10 |
| 1 | 150k | R_0805 | R1 |
| 1 | 27k | R_0805 | R2 |
| 1 | NI | R_0805 | R3 |
| 7 | 27 | R_0805 | R4, R6, R7, R11, R15, R16, R20 |
| 2 | 1k | R_0805 | R5, R8 |
| 1 | 4.7k | R_0805 | R9 |
| 1 | 470 | R_0805 | R10 |
| 1 | 8k2 | R_0805 | R12 |
| 2 | 10k | R_0805 | R13, R27 |
| 1 | 46k | R_0805 | R14 |
| 2 | 10k | R_0402 | R17, R28 |
| 2 | 4k7 | R_0805 | R18, R21 |
| 1 | NC | R_0805 | R19 |
| 4 | 510 | R_0805 | R23, R24, R25, R26 |
Board design files
The KiCad project lives in the myhomecan/board repository on GitHub; these links point at the commit this page was built from.
- Layouthomecan.kicad_pcb
Board: common questions
What microcontroller does the Board use?
The Board is built around the STM32F103C_QFP48, from the STM32 family.
How big is the Board?
The Board measures 32 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Board?
89 components, from 50 distinct parts. The full bill of materials is listed on this page.
Where can I download the Board design files?
From the myhomecan/board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Board design in my own project?
The repository has no license, so all rights stay with myhomecan. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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