BMS Master
About the BMS Master PCB
BMS Master is an open source STM32 PCB design by ncku-formula-racing, published on GitHub. It is a 2-layer board measuring 65 × 45 mm, with 74 components from 47 distinct parts.
Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the LMZM23600V5SILR, AP2204K-ADJ, BQ79600-Q1 and SN65HVD256D. By type, the board carries 22 capacitors, 21 resistors, 8 connectors, 6 ICs, 6 diodes and 5 jumpers.
It belongs with the power & battery designs in this gallery.
From the project
A monorepo of circuit boards
Main components on the BMS Master
BMS Master bill of materials (BOM)
74 components, 47 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LMZM23600V5SILR | MODULE_LMZM23601V5SILR | U1 |
| 1 | AP2204K-ADJ | SOT-23-5 | U2 |
| 1 | STM32F103C8Tx | LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | BQ79600-Q1 | TSSOP-16_4.4x5mm_P0.65mm | U4 |
| 1 | SN65HVD256D | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | ~ | Daphnis-I | U7 |
| 1 | 2N7002 | SOT-23 | Q1 |
| 1 | 8M | Crystal_SMD_SeikoEpson_FA238-4Pin_3.2x2.5mm | Y1 |
| 1 | Conn_PWR | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J1 |
| 1 | PROG | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | Conn_Fault | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J3 |
| 1 | BMS_M_IN | Molex_Micro-Fit_3.0_43650-0200_1x02_P3.00mm_Horizontal | J4 |
| 1 | Conn_CAN | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J5 |
| 1 | Conn_CRS | JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J6 |
| 1 | Micro_SD_Card | microSD_HC_Molex_47219-2001 | J8 |
| 1 | USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_Palconn_UTC16-G | J9 |
| 1 | Jumper_2_Open | TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | JP1 |
| 1 | LPUTX | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | UTX | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
| 1 | URX | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LPURX | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5 |
| 1 | SW_SPST | SW_SPST_FSMSM | SW1 |
| 1 | TP_3V3 | Pin_D1.0mm_L10.0mm | TP1 |
| 1 | TP_5V | Pin_D1.0mm_L10.0mm | TP2 |
| 1 | Wuerth_750319696 | Transformer_Wuerth_750315371 | TR1 |
| 1 | PWR_Yellow | LED_0805_2012Metric | D1 |
| 1 | RUN_GREEN | LED_0805_2012Metric | D2 |
| 1 | DESD12VL2BTQ | SOT-23 | D3 |
| 1 | FAULT_RED | LED_0805_2012Metric | D4 |
| 1 | LED2 | LED_0805_2012Metric | D5 |
| 1 | LED1 | LED_0805_2012Metric | D6 |
| 3 | 1u | C_0603_1608Metric | C1, C2, C21 |
| 2 | 10u | C_0805_2012Metric | C3, C4 |
| 2 | 20p | C_0603_1608Metric | C5, C6 |
| 9 | 100n | C_0603_1608Metric | C9, C10, C11, C12, C13, C20, C22, C24 +1 |
| 3 | 220n | C_0603_1608Metric | C14, C15, C19 |
| 2 | 220p | C_0603_1608Metric | C16, C17 |
| 1 | 100p | C_0603_1608Metric | C18 |
| 6 | 1K | R_0603_1608Metric | R1, R6, R8, R18, R19, R23 |
| 2 | 100K | R_0603_1608Metric | R3, R11 |
| 1 | 165k | R_0603_1608Metric | R5 |
| 4 | 10K | R_0603_1608Metric | R7, R9, R10, R14 |
| 2 | 49R | R_0603_1608Metric | R12, R13 |
| 2 | 60R | R_0603_1608Metric | R15, R16 |
| 2 | 5k1 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R20, R21 |
| 1 | 30R | R_0603_1608Metric | R22 |
| 1 | 1k5 | R_0603_1608Metric | R24 |
BMS Master design files
The KiCad project lives in the ncku-formula-racing/circuit repository on GitHub; these links point at the commit this page was built from.
BMS Master: common questions
What microcontroller does the BMS Master use?
The BMS Master is built around the STM32F103C8Tx, from the STM32 family.
How big is the BMS Master PCB?
The BMS Master measures 65 × 45 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BMS Master?
74 components, from 47 distinct parts. The full bill of materials is listed on this page.
Where can I download the BMS Master design files?
From the ncku-formula-racing/circuit repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the BMS Master design in my own project?
The repository has no license, so all rights stay with ncku-formula-racing. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the BMS Master 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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