Bread board
About the Bread board
Bread board is an open source STM32 PCB design by cr1tbit, published on GitHub. It is a 4-layer board measuring 100 × 77 mm, with 224 components from 58 distinct parts.
Its main chip is the STM32F103RFTx, from the STM32 family. Other key parts include the FE2.1, USBLC6-2SC6, MIC2405x, FSUSB30MUX and 24LC00. By type, the board carries 73 resistors, 66 capacitors, 29 ICs, 12 transistors, 12 diodes and 10 connectors.
From the project
USB-C to everything adapter
Main components on the Bread board
Bread board bill of materials (BOM)
224 components, 58 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | FE2.1 | LQFP-48_7x7mm_P0.5mm | IC1 |
| 1 | STM32F103RFTx | LQFP-64_10x10mm_P0.5mm | U1 |
| 6 | USBLC6-2SC6 | SOT-23-6 | U2, U3, U17, U18, U19, U20 |
| 1 | MIC2405x | QFN-28-3EP_5x6mm_MIC2045x | U4 |
| 1 | FSUSB30MUX | MSOP-10_3x3mm_P0.5mm | U5 |
| 1 | 24LC00 | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 2 | LB66200 | SOT-5x3-8 | U7, U9 |
| 10 | INA181 | SOT-23-6 | U8, U10, U21, U22, U23, U24, U25, U26 +2 |
| 1 | ADP1612 | MSOP-8_3x3mm_P0.65mm | U11 |
| 1 | MCP6001U | SOT-23-5 | U12 |
| 4 | AZ1117-ADJ | SOT-223-3_TabPin2 | U13, U14, U15, U16 |
| 6 | AO3401A | SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6 |
| 6 | BC847 | SOT-23 | Q7, Q8, Q9, Q10, Q11, Q12 |
| 2 | 6MHZ 2520 | Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1, Y2 |
| 1 | Barrel_Jack_Switch | BarrelJack_CUI_PJ-102AH_Horizontal | J1 |
| 2 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_GCT_USB4085 | J2, J3 |
| 1 | Conn_02x30_Top_Bottom | Hirose_DF12_DF12E3.0-60DP-0.5V_2x30_P0.50mm_Vertical | J4 |
| 1 | USB2 | USB_A_Molex_67643_Horizontal | J5 |
| 1 | USB3 | USB_A_Molex_67643_Horizontal | J6 |
| 1 | USB4 | USB_A_Molex_67643_Horizontal | J7 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Screw_Terminal_01x12 | TerminalBlock_Phoenix_PT-1,5-12-5.0-H_1x12_P5.00mm_Horizontal | J8 |
| 1 | USB1 | USB_A_Molex_67643_Horizontal | J9 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J10 |
| 3 | 1A | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | F1, F2, F3 |
| 1 | FUSE_BYP | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | USB1_PWR_BYP | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | 5V_BYP | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
| 1 | TEST_POT_ENA | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
| 1 | MCU_USB_MUX_ENA | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
| 3 | X | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP6, JP7, JP8 |
| 1 | 10k/DNP | Potentiometer_Bourns_TC33X_Vertical | RV1 |
| 2 | PCM13 | SW_SP3T_PCM13 | SW1, SW4 |
| 2 | BUT_SMD | SW_SPST_TL3342 | SW2, SW3 |
| 3 | D_Schottky | D_SMA | D1, D2, D3 |
| 9 | LED | LED_0603_1608Metric | D4, D5, D6, D7, D8, D9, D10, D11 +1 |
| 1 | 2.2u | L_Taiyo-Yuden_NR-80xx_HandSoldering | L1 |
| 1 | L_Iron_Coupled | L_Wuerth_WE-DD-Typ-M-Typ-S | L2 |
| 1 | L_Ferrite | L_0805_2012Metric | L3 |
| 1 | L_Iron | L_1206_3216Metric_Pad1.42x1.75mm_HandSolder | L4 |
| 1 | C | C_1210_3225Metric | C1 |
| 4 | 20p | C_0402_1005Metric | C2, C6, C8, C57 |
| 25 | 10u | C_0603_1608Metric | C3, C4, C5, C13, C17, C21, C23, C29 +17 |
| 31 | 100n | C_0402_1005Metric | C7, C9, C10, C11, C12, C14, C15, C16 +23 |
| 2 | 22u | C_0603_1608Metric | C19, C20 |
| 1 | 2.2u | C_0603_1608Metric | C28 |
| 1 | 47u | C_0603_1608Metric | C36 |
| 1 | 10u/16V | C_0603_1608Metric | C53 |
| 1 | 470k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 25 | 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R7, R8, R9, R10, R11, R12, R14 +17 |
| 4 | 5.1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R5, R6 |
| 8 | 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13, R42, R46, R47, R50, R51, R52, R53 |
| 1 | 0.5R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R17 |
| 1 | 0R | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R18 |
| 14 | 2k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R22, R24, R58, R60, R61, R62, R63, R64 +6 |
| 10 | 3k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23, R25, R48, R49, R54, R55, R56, R57 +2 |
| 4 | 50mR | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R36, R37, R38, R40 |
| 1 | 200mR | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R39 |
| 4 | 100mR | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R41, R43, R44, R45 |
Bread board design files
The KiCad project lives in the cr1tbit/superhubby repository on GitHub; these links point at the commit this page was built from.
Bread board: common questions
What microcontroller does the Bread board use?
The Bread board is built around the STM32F103RFTx, from the STM32 family.
How big is the Bread board?
The Bread board measures 100 × 77 mm, has 4 copper layers and is 1.025 mm thick.
How many components are on the Bread board?
224 components, from 58 distinct parts. The full bill of materials is listed on this page.
Where can I download the Bread board design files?
From the cr1tbit/superhubby repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Bread board design in my own project?
The repository has no license, so all rights stay with cr1tbit. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Bread 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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