HardLabs

CommBoard

cdcortesr·CommBoard

CommBoard PCB layout, top view — open source STM32 board by cdcortesr

About the CommBoard PCB

CommBoard is an open source STM32 PCB design by cdcortesr, published on GitHub. It is a 2-layer board measuring 34.8 × 34.3 mm, with 28 components from 16 distinct parts.

Its main chip is the STM32F103C8T6, from the STM32 family. Other key parts include the AMS1117-3.3 (SOT223). By type, the board carries 13 capacitors, 5 resistors, 4 connectors, 2 ICs, 1 crystal and 1 switch.

From the project

Serial communication board

Self-built serial communication board based on an STM32 microcontroller, designed for embedded systems applications. Key features and technical details include:

    • I²C (Inter-Integrated Circuit) interface for peripheral connectivity.

    • UART (Universal Asynchronous Receiver-Transmitter) for serial communication.

    • JTAG interface for in-circuit programming and debugging.

CommBoard, from the project README
From the project README

Main components on the CommBoard

AMS1117-3.3 (SOT223)STM32F103C8T6

CommBoard bill of materials (BOM)

28 components, 16 distinct parts.

QtyPartRefs
1
AMS1117-3.3 (SOT223)
U1
1
STM32F103C8T6
U2
1
16MHz
Y1
3
Conn_01x04_Male
J1, J2, J3
1
USB_B_Micro
J4
1
SW_SPDT
SW1
1
RED
D1
1
120R
FB1
2
22u
C1, C2
1
10u
C3
5
100n
C4, C5, C6, C7, C11
1
10n
C8
2
1u
C9, C10
2
10p
C12, C13
4
1k5
R1, R3, R4, R5
1
10k
R2

CommBoard design files

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

CommBoard: common questions

What microcontroller does the CommBoard use?

The CommBoard is built around the STM32F103C8T6, from the STM32 family.

How big is the CommBoard PCB?

The CommBoard measures 34.8 × 34.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CommBoard?

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

Where can I download the CommBoard design files?

From the cdcortesr/CommBoard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CommBoard design in my own project?

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

Can I test firmware for the CommBoard 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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