HardLabs

Db25 bob v2

coon42·stmbl_otter·hw/kicad/bob/db25_bob_v2/db25_bob_v2.kicad_pcb

Db25 bob v2 PCB layout, top view — open source STM32 board by coon42

About the Db25 bob v2 PCB

Db25 bob v2 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 129 components from 16 distinct parts.

Its main chip is the STM32F407VG, from the STM32 family. Other key parts include the ADM4857, ADuM1201WT, NCV7608, 74HC595 and DP83848C. By type, the board carries 33 diodes, 30 resistors, 23 ICs, 23 capacitors, 18 connectors and 2 jumpers.

It belongs with the robotics & motion and wearables designs in this gallery, and the repository also holds 1 earlier revision of it.

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:

Db25 bob v2, from the project README
From the project README

Main components on the Db25 bob v2

STM32F407VGADM4857ADuM1201WTNCV760874HC595DP83848C

Db25 bob v2 bill of materials (BOM)

129 components, 16 distinct parts.

QtyPartRefs
1
STM32F407VG
U1
8
ADM4857
U2, U4, U6, U8, U10, U12, U14, U16
9
ADuM1201WT
U3, U5, U7, U9, U11, U13, U15, U17 +1
2
NCV7608
U18, U19
2
74HC595
U20, U21
1
DP83848C
U22
8
RJ45
J1, J2, J3, J4, J5, J6, J7, J8
1
DB25
J9
1
RJ45-TRANSFO
J10
8
CONN_01X08
P1, P2, P3, P4, P5, P6, P7, P8
2
JUMPER
JP1, JP2
1
D
D3
32
LED
D31, D32, D33, D34, D35, D36, D37, D38 +24
8
C
C1, C2, C3, C4, C5, C6, C7, C8
15
C
C9, C10, C11, C12, C13, C14, C15, C16 +7
30
R
R1, R2, R3, R4, R5, R6, R7, R8 +22

Db25 bob v2 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.

Db25 bob v2: common questions

What microcontroller does the Db25 bob v2 use?

The Db25 bob v2 is built around the STM32F407VG, from the STM32 family.

How big is the Db25 bob v2 PCB?

The Db25 bob v2 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Db25 bob v2?

129 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Db25 bob v2 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 Db25 bob v2 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 Db25 bob v2 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.

More boards in stmbl_otter

Earlier revisions in the repo: db25_bob

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