HardLabs

STM32-USBb

diegomrno·STM32-USBb·STM32-USBb/STM32-USBb.kicad_pcb

STM32-USBb PCB layout, top view — open source STM32 board by diegomrno

About the STM32-USBb PCB

STM32-USBb is an open source STM32 PCB design by diegomrno, published on GitHub. It is a 2-layer board measuring 44 × 33 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. By type, the board carries 13 capacitors, 5 resistors, 4 connectors, 2 ICs, 1 crystal and 1 switch.

From the project

Experimental PCB based on an STM32 microcontroller with USB type B

STM32-USBb is an experimental PCB based on an STM32 microcontroller, designed for research and prototyping purposes.

This board is part of the Raptor project by Infinite.

- U1 : STM32 (STM32F103C8T6) microcontroller (main MCU) - U2 : 3.3 V linear voltage regulator

- Y3 : 16 MHz external crystal (MCU clock)

- J1, J2, J3 : Pin headers (GPIO / debug / expansion) - J4 : USB Micro-B connector (power + USB data)

STM32-USBb, from the project README
From the project README

Main components on the STM32-USBb

STM32F103C8T6AMS1117-3.3

STM32-USBb bill of materials (BOM)

28 components, 16 distinct parts.

QtyPartRefs
1
STM32F103C8T6
U1
1
AMS1117-3.3
U2
1
16MHz
Y3
3
Conn_01x04_Pin
J1, J2, J3
1
USB_B_Micro
J4
1
SW_SPDT
SW1
1
LED
D1
1
FerriteBead
FB1
2
22u
C1, C2
5
100n
C3, C4, C5, C6, C11
1
10u
C7
1
10n
C8
2
1u
C9, C10
2
10p
C12, C13
4
1k5
R1, R3, R4, R5
1
10k
R2

STM32-USBb design files

The KiCad project lives in the diegomrno/STM32-USBb repository on GitHub; these links point at the commit this page was built from.

STM32-USBb: common questions

What microcontroller does the STM32-USBb use?

The STM32-USBb is built around the STM32F103C8T6, from the STM32 family.

How big is the STM32-USBb PCB?

The STM32-USBb measures 44 × 33 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the STM32-USBb?

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

Where can I download the STM32-USBb design files?

From the diegomrno/STM32-USBb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the STM32-USBb design in my own project?

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

Can I test firmware for the STM32-USBb 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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