HardLabs

Stmbl 4.0

coon42·stmbl_otter·hw/kicad/v4.0/stmbl_4.0.kicad_pcb

Stmbl 4.0 PCB layout, top view — open source STM32 board by coon42
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About the Stmbl 4.0 PCB

Stmbl 4.0 is an open source STM32 PCB design by coon42, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 100 × 100 mm, with 409 components from 56 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 162 resistors, 145 capacitors, 32 ICs, 22 diodes, 18 connectors and 12 inductors.

It belongs with the robotics & motion and wearables designs in this gallery.

From the project

- For some reason you need exactly this compiler: gcc-arm-none-eabi-54-2016q3 - On any newer gcc version, the board does not boot after flashing !? - Adjust path in TOOLCHAIN variable in toolchain.mak** file - The board works correctly if the green LED lights up. When receiving d

- For some reason you need exactly this compiler: gcc-arm-none-eabi-54-2016q3 - On any newer gcc version, the board does not boot after flashing !? - Adjust path in TOOLCHAIN variable in toolchain.mak** file - The board works correctly if the green LED lights up. When receiving data over UART the LED flashes blue.

- Bridge pins for DFU mode while plugging in USB cable - Flash by using the following command:

Stmbl 4.0, from the project README
From the project README

Main components on the Stmbl 4.0

USBLC6-4SC6zldo1117SI8621ACT4088lnk304DLM358SN65176BIRAM256anon_platedSTM32F303CBTxSTM32F405VG

Stmbl 4.0 bill of materials (BOM)

409 components, 56 distinct parts.

QtyPartRefs
6
USBLC6-4SC6
U1, U20, U21, U22, U23, U29
1
zldo1117
U2
1
SI8621
U3
4
ACT4088
U4, U13, U27, U28
1
lnk304D
U5
2
LM358
U6, U7
10
SN65176B
U8, U9, U10, U11, U14, U15, U16, U17 +2
1
IRAM256a
U12
4
non_plated
U24, U30, U31, U32
1
STM32F303CBTx
U25
1
STM32F405VG
U26
4
IRLML6344
Q1, Q2, Q3, Q4
2
8M
Y1, Y2
3
RJ45_LED
J1, J2, J3
2
USB_OTG
P1, P11
3
CONN_01X02
P2, P3, P15
1
CONN_01X02
P4
2
CONN_01X06
P5, P9
1
CONN_01X02
P6
2
CONN_01X04
P7, P12
Show 36 more
QtyPartRefs
1
CONN_01X03
P8
1
CONN_02X06
P10
1
CONN_01X04
P13
1
CONN_01X04
P14
3
Jumper_NO_Small
JP1, JP4, JP9
4
JUMPER3_NC
JP2, JP3, JP5, JP6
4
testpoint
T1, T44, T45, T46
1
24V
VR1
2
red
D1, D16
6
ES1J R2
D2, D3, D5, D7, D10, D11
8
green
D4, D8, D14, D15, D18, D19, D20, D24
4
SS34A
D6, D9, D12, D13
1
yellow
D17
1
SMAJ24A TVS 24V
D22
7
220r 700mA
L1, L3, L7, L8, L9, L10, L11
1
1m 250mA
L2
4
4.7µH 1.5A
L4, L5, L6, L12
75
100n
C1, C2, C7, C9, C10, C12, C13, C15 +67
6
150n
C3, C28, C34, C38, C92, C93
16
10µ
C4, C14, C35, C51, C68, C69, C70, C97 +8
15
18p
C5, C6, C11, C20, C23, C24, C25, C26 +7
22
2.2µ
C8, C18, C42, C43, C44, C50, C62, C65 +14
2
270µ
C21, C22
8
1n
C46, C47, C48, C49, C52, C59, C64, C81
1
22µ
C143
14
120
R1, R23, R24, R25, R26, R31, R109, R110 +6
41
1k
R2, R12, R13, R14, R15, R16, R30, R45 +33
19
470
R3, R4, R5, R6, R8, R17, R18, R46 +11
32
10k
R7, R35, R36, R37, R38, R39, R41, R42 +24
15
22
R9, R10, R11, R40, R86, R87, R88, R89 +7
13
15k
R19, R47, R48, R49, R50, R54, R55, R56 +5
10
3.9k
R20, R22, R29, R34, R53, R59, R74, R79 +2
5
51k
R21, R60, R97, R133, R141
8
249k
R27, R28, R32, R33, R51, R52, R77, R78
3
0.003
R80, R81, R82
2
1.5k
R143, R150

Stmbl 4.0 design files

The KiCad project lives in the coon42/stmbl_otter 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?

409 components, from 56 distinct parts. The full bill of materials is listed on this page.

Where can I download the Stmbl 4.0 design files?

From the coon42/stmbl_otter 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 coon42 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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