HardLabs

Wro26

Battlepillars·Wro26·kicad/baseboard/baseboard.kicad_pcb

Wro26 PCB layout, top view — open source STM32 board by Battlepillars

About the Wro26 PCB

Wro26 is an open source STM32 PCB design by Battlepillars, published on GitHub. It is a 2-layer board measuring 68.6 × 106.7 mm, with 48 components from 31 distinct parts.

Its main chip is the STM32F411_BLACKPILL, from the STM32 family. Other key parts include the TPD4EUSB30, MAGJACK-A70-112-331N126, DRV8871DDA, AMS1117-3.3 and L7805. By type, the board carries 16 connectors, 14 resistors, 7 ICs, 5 capacitors, 4 diodes and 1 switch.

From the project

These files have been created in version 9 of KiCAD.

These files have been created in version 9 of KiCAD.

Some of the 3d models need to be downloaded form the following places and put into the CM5IO.3shapes directory some models are approximations.

https://datasheets.raspberrypi.org/cm5/CM5-step.zip https://www.molex.com/molex/products/part-detail/memorycardsocket/5033981892

The models provided in the 3dmodels directory are from various manufacturers including Diodes, Hirose, MTCONN, Toby, TRXCOM. Terms and conditions for the use of the models remain with the original manufacture.

Main components on the Wro26

TPD4EUSB30MAGJACK-A70-112-331N126STM32F411_BLACKPILLDRV8871DDAAMS1117-3.3L7805

Wro26 bill of materials (BOM)

48 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
TPD4EUSB30
U1, U2
1
MAGJACK-A70-112-331N126
MagJack-A70-112-331N126
U3
1
STM32F411_BLACKPILL
STM32F411_BlackPill
U6
1
DRV8871DDA
U7
1
AMS1117-3.3
U8
1
L7805
U9
5
CONN_01X06_PIN
Conn_01x06_Pin
J1, J4, J7, J10, J12
2
10164227-1001A1RLF
J2, J6
2
CONN_01X02_PIN
Conn_01x02_Pin
J3, J11
2
CONN_01X22_FEMALE
Conn_01x22_Female
J5, J16
1
THD-20-R
J8
1
JST_SHBM04B-SRSS-TB
J14
1
CONN_01X03_PIN
Conn_01x03_Pin
J15
1
DfRobot BNO055
J17
1
CONN_01X05
Conn_01x05
J18
1
ComputeModule5-CM5
Module1
1
SW_SPST
SW1
1
C84256
LED Red
D1
1
C2297
LED Green
D2
1
LED Green
D3
Show 11 more
QtyPartRefs
1
C2296
LED Green
D4
3
100N
100n
C1, C9, C18
1
0.1UF/15V
0.1uF/15V
C4
1
22UF/15V
22uF/15V
C5
5
1k
R1, R4, R5, R10, R12
2
470R
R2, R3
3
C4190
2.2K 1%
R6, R7, R8
1
4K7
4k7
R9
1
C25804
10K 1%
R11
1
30K
30k
R13
1
2.2K 1%
R14

Wro26 design files

The KiCad project lives in the Battlepillars/Wro26 repository on GitHub; these links point at the commit this page was built from.

Wro26: common questions

What microcontroller does the Wro26 use?

The Wro26 is built around the STM32F411_BLACKPILL, from the STM32 family.

How big is the Wro26 PCB?

The Wro26 measures 68.6 × 106.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wro26?

48 components, from 31 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 Wro26 design files?

From the Battlepillars/Wro26 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 Wro26 design in my own project?

The repository has no license, so all rights stay with Battlepillars. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Wro26 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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