SmallMD
About the SmallMD PCB
SmallMD is an open source STM32 PCB design by Tomoshibi-technology, published on GitHub under the MIT license. It is a 2-layer board measuring 90 × 40 mm, with 142 components from 52 distinct parts.
Its main chip is the STM32G030K6T6, from the STM32 family. Other key parts include the AZ1084CD-3.3, AZ1084CD-5.0, MAX3485, LT6106 and TLP2361. By type, the board carries 57 resistors, 26 capacitors, 19 diodes, 13 ICs, 8 transistors and 7 connectors.
From the project
RoboCup JapanOpen 2024とEindohoven 2024に向けての回路開発
Main components on the SmallMD
SmallMD bill of materials (BOM)
142 components, 52 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AZ1084CD-3.3 | TO-252-3_TabPin2 | U1 |
| 1 | AZ1084CD-5.0 | TO-252-3_TabPin2 | U2 |
| 1 | STM32G030K6T6 | LQFP-32_7x7mm_P0.8mm | U3 |
| 4 | MAX3485 | SOP-8_3.9x4.9mm_P1.27mm | U4, U5, U7, U12 |
| 1 | LT6106 | SOT-23-5 | U6 |
| 2 | TLP2361 | SO-6_4.4x3.6mm_P1.27mm | U8, U9 |
| 2 | IR2302 | SOP-8_3.9x4.9mm_P1.27mm | U10, U11 |
| 1 | NJU6319AE | SOP-8_3.9x4.9mm_P1.27mm | U13 |
| 2 | SSM6J808R | SSM6J808R | Q1, Q3 |
| 3 | BSS138 | SOT-23 | Q2, Q14, Q15 |
| 1 | S8050 | SOT-23 | Q16 |
| 2 | μPA2753GR | SOP-8_3.9x4.9mm_P1.27mm | Q18, Q19 |
| 1 | 16MHZ 16MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | CONN_01X02_MALE Conn_01x02_Male | AMASS_XT30U-M_1x02_P5.0mm_Vertical | J1 |
| 1 | CONN_01X10_MALE Conn_01x10_Male | BoxHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 1 | CONN_01X02_FEMALE Conn_01x02_Female | AMASS_XT30U-F_1x02_P5.0mm_Vertical | J4 |
| 2 | CONN_01X04_MALE Conn_01x04_Male | Molex_SPOX_5267-04A_1x04_P2.50mm_Vertical | J5, J6 |
| 1 | CONN_01X10_MALE Conn_01x10_Male | IDC-Header_2x05_P2.54mm_Vertical | J7 |
| 1 | CONN_01X06_MALE Conn_01x06_Male | JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J8 |
| 3 | JUMPER_2_OPEN Jumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2, JP4 |
Show 32 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | JUMPER_2_OPEN Jumper_2_Open | PinHeader_1x02_P2.54mm_Vertical | JP3 |
| 2 | SOLDERJUMPER_3_BRIDGED12 SolderJumper_3_Bridged12 | SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mm_NumberLabels | JP5, JP6 |
| 1 | SW_DIP_X05 SW_DIP_x05 | DIP-10_W7.62mm | SW1 |
| 1 | SW_SPDT | 3P_SPDT_SlideSwitch | SW2 |
| 1 | SW_SPDT_White | SW_Slide_SPDT_White | SW3 |
| 1 | SW_SPST | SW_Push_1P1T_NO_Vertical_Wuerth_434133025816 | SW4 |
| 1 | TestPoint | TestPoint_THTPad_D2.0mm_Drill1.0mm | TP5 |
| 4 | 1N5819WS | D_SOD-323_HandSoldering | D1, D7, D8, D14 |
| 7 | SS2040FL | D_SOD-123 | D2, D15, D16, D19, D20, D21, D22 |
| 5 | Red | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3, D4, D5, D17, D18 |
| 1 | Yellow | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D6 |
| 2 | Green | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D10, D13 |
| 7 | 1UF 1uF | C_0402_1005Metric | C1, C3, C4, C5, C6, C12, C29 |
| 4 | 10UF 10uF | C_0805_2012Metric | C2, C7, C17, C18 |
| 11 | 0.1UF 0.1uF | C_0402_1005Metric | C8, C11, C19, C20, C21, C22, C23, C24 +3 |
| 2 | 470UF 470uF | C_Elec_8x10.2 | C13, C14 |
| 2 | C13585 C | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C27, C28 |
| 21 | 10K 10k | R_0402_1005Metric | R1, R2, R3, R4, R5, R6, R7, R9 +13 |
| 1 | 100K 100k | R_0402_1005Metric | R8 |
| 1 | 33K 33k | R_0603_1608Metric | R11 |
| 1 | 10K 10k | R_0603_1608Metric | R12 |
| 6 | 1k | R_0402_1005Metric | R13, R14, R15, R16, R31, R34 |
| 8 | 2.2K 2.2k | R_0402_1005Metric | R35, R36, R37, R38, R56, R57, R73, R74 |
| 2 | 20MR 20mR | R_2512_6332Metric | R39, R46 |
| 6 | 47 | R_0603_1608Metric | R40, R41, R63, R64, R65, R66 |
| 4 | 120 | R_0402_1005Metric | R42, R43, R60, R75 |
| 1 | 39 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R44 |
| 1 | 3.3K 3.3k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R45 |
| 1 | 7.5K 7.5k | R_0603_1608Metric | R49 |
| 2 | 470 | R_0402_1005Metric | R50, R51 |
| 1 | 20K 20k | R_0402_1005Metric | R54 |
| 1 | MPR | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R67 |
SmallMD design files
The KiCad project lives in the Tomoshibi-technology/RCJ-Japan2024-Circuit repository on GitHub; these links point at the commit this page was built from.
SmallMD: common questions
What microcontroller does the SmallMD use?
The SmallMD is built around the STM32G030K6T6, from the STM32 family.
How big is the SmallMD PCB?
The SmallMD measures 90 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SmallMD?
142 components, from 52 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the SmallMD design files?
From the Tomoshibi-technology/RCJ-Japan2024-Circuit repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the SmallMD design in my own project?
Yes, under the terms of its MIT license, which Tomoshibi-technology chose for the repository.
Can I test firmware for the SmallMD 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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