Stmbl 4.0
About the Stmbl 4.0 PCB
Stmbl 4.0 is an open source STM32 PCB design by rene-dev, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 100 × 100 mm, with 412 components from 55 distinct parts.
Its main chip is the STM32F303CBTx, from the STM32 family. Other key parts include the USBLC6-4SC6, zldo1117, SI8621, ACT4088 and LNK304D. By type, the board carries 167 resistors, 146 capacitors, 38 ICs, 22 diodes, 15 connectors and 12 inductors.
It belongs with the robotics & motion and wearables designs in this gallery.
From the project
AC Servo Driver for STM32F4
Build Log: https://travis-ci.org/rene-dev/stmbl
THE AUTHORS OF THIS SOFTWARE ACCEPT ABSOLUTELY NO LIABILITY FOR ANY HARM OR LOSS RESULTING FROM ITS USE. IT IS EXTREMELY UNWISE TO RELY ON SOFTWARE ALONE FOR SAFETY. Any machinery capable of harming persons must have provisions for completely removing power from all motors, etc, before persons enter any danger area. All machinery must be designed to comply with local and national safety codes, and the authors of this software can not, and do not, take any responsibility for such compliance.
Main components on the Stmbl 4.0
Stmbl 4.0 bill of materials (BOM)
412 components, 55 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 6 | USBLC6-4SC6 | SOT-23-6 | U1, U20, U21, U22, U23, U29 |
| 1 | zldo1117 | SOT-223 | U2 |
| 1 | SI8621 | SOIC-8-N | U3 |
| 4 | ACT4088 | SOT-23-6 | U4, U13, U27, U28 |
| 1 | LNK304D | SOIC-7 | U5 |
| 2 | LM358 | SOIC-8-N | U6, U7 |
| 10 | SN65176B | SOIC-8-N | U8, U9, U10, U11, U14, U15, U16, U17 +2 |
| 1 | IRAM256a | IRAM256 | U12 |
| 4 | non_plated | non_plated_3mm | U24, U30, U31, U32 |
| 1 | STM32F303CBTx | LQFP-48_7x7mm_Pitch0.5mm | U25 |
| 1 | STM32F405VG | LQFP-100_14x14mm_Pitch0.5mm | U26 |
| 1 | heatsink | non_plated_1mm | U33 |
| 1 | fan | non_plated_1mm | U34 |
| 4 | non_plated | non_plated_1mm | U35, U36, U37, U39 |
| 5 | IRLML6344 | SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 2 | 8M | Crystal_SMD_0503_4Pads | Y1, Y2 |
| 3 | RJ45_LED | RJ45_LED | J1, J2, J3 |
| 2 | USB_OTG | USB_Micro-B | P1, P11 |
| 3 | CONN_01X02 | RM3.5_1x2 | P2, P3, P15 |
| 1 | CONN_01X02 | Pin_Header_Angled_1x02 | P4 |
Show 35 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | CONN_01X06 | RM3.5_1x6 | P5, P9 |
| 1 | CONN_01X02 | RM5.08_1x2 | P6 |
| 1 | CONN_01X03 | RM5.08_1x3 | P8 |
| 1 | CONN_01X04 | Socket_Strip_Straight_1x04 | P13 |
| 1 | CONN_01X04 | Pin_Header_Angled_1x04 | P14 |
| 5 | testpoint | Measurement_Point_Round-SMD-Pad_Small | T1, T2, T44, T45, T46 |
| 2 | red | LED-0805-SIDE | D1, D16 |
| 6 | ES1J R2 | SMA_Standard | D2, D3, D5, D7, D10, D11 |
| 8 | green | LED-0805-SIDE | D4, D8, D14, D15, D18, D19, D20, D24 |
| 4 | SS34A | SMA_Standard | D6, D9, D12, D13 |
| 1 | yellow | LED-0805-SIDE | D17 |
| 1 | SMAJ24A TVS 24V | SMA_Standard | D22 |
| 7 | 220r 700mA | R_0603 | L1, L3, L7, L8, L9, L10, L11 |
| 1 | 1m 250mA | NPI31W | L2 |
| 2 | 10µH 1A | SMD_INDUCTOR_32x25 | L4, L6 |
| 2 | 4.7µH 1.5A | SMD_INDUCTOR_32x25 | L5, L12 |
| 75 | 100n | C_0603 | C1, C2, C7, C9, C10, C12, C13, C15 +67 |
| 6 | 150n | C_1808 | C3, C28, C34, C38, C92, C93 |
| 16 | 10µ | C_0805 | C4, C14, C35, C51, C68, C69, C70, C97 +8 |
| 15 | 18p | C_0603 | C5, C6, C11, C20, C23, C24, C25, C26 +7 |
| 23 | 2.2µ | C_0603 | C8, C18, C42, C43, C44, C50, C62, C65 +15 |
| 2 | 270µ | C_Radial_D26_L45_P10 | C21, C22 |
| 8 | 1n | C_0603 | C46, C47, C48, C49, C52, C59, C64, C81 |
| 1 | 22µ | C_Radial_D6.5_L11_P2.5 | C143 |
| 14 | 120 | R_0603 | R1, R23, R24, R25, R26, R31, R109, R110 +6 |
| 40 | 1k | R_0603 | R2, R12, R13, R14, R15, R16, R30, R45 +32 |
| 19 | 470 | R_0603 | R3, R4, R5, R6, R8, R17, R18, R46 +11 |
| 32 | 10k | R_0603 | R7, R35, R36, R37, R38, R39, R41, R42 +24 |
| 17 | 22 | R_0603 | R9, R10, R11, R40, R86, R87, R88, R89 +9 |
| 13 | 15k | R_0603 | R19, R47, R48, R49, R50, R54, R55, R56 +5 |
| 14 | 3.9k | R_0603 | R20, R22, R29, R34, R53, R59, R74, R79 +6 |
| 5 | 51k | R_0603 | R21, R60, R97, R133, R141 |
| 8 | 249k | R_1206 | R27, R28, R32, R33, R51, R52, R77, R78 |
| 3 | 0.003 | R_2512 | R80, R81, R82 |
| 2 | 1.5k | R_0603 | R143, R150 |
Stmbl 4.0 design files
The KiCad project lives in the rene-dev/stmbl repository on GitHub; these links point at the commit this page was built from.
Stmbl 4.0: common questions
What microcontroller does the Stmbl 4.0 use?
The Stmbl 4.0 is built around the STM32F303CBTx, from the STM32 family.
How big is the Stmbl 4.0 PCB?
The Stmbl 4.0 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Stmbl 4.0?
412 components, from 55 distinct parts. The full bill of materials is listed on this page.
Where can I download the Stmbl 4.0 design files?
From the rene-dev/stmbl repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Stmbl 4.0 design in my own project?
Yes, under the terms of its GPL-3.0 license, which rene-dev chose for the repository.
Can I test firmware for the Stmbl 4.0 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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