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STM32-Reference-Keyboard

AeternusCo·STM32-Reference-Keyboard

STM32-Reference-Keyboard PCB layout, top view — open source STM32 board by AeternusCo
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About the STM32-Reference-Keyboard PCB

STM32-Reference-Keyboard is an open source STM32 PCB design by AeternusCo, published on GitHub under the Unlicense license. It is a 2-layer board measuring 38.1 × 38.9 mm, with 46 components from 27 distinct parts.

Its main chip is the STM32F072CBTx, from the STM32 family. Other key parts include the SRV05-4 and MCP1700T-3302E_SOT23. By type, the board carries 4 switches, 4 diodes, 3 ICs, 1 crystal and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

This schematic has not been officially tested. It follows best practices and should work, but please confirm your design before placing a large order!

This schematic has not been officially tested. It follows best practices and should work, but please confirm your design before placing a large order!

PCBs have been ordered to confirm the design works as intended, this warning will be removed once the design is verified.

The primary goal of this project is to provide a semi-opinionated starting point for people new to STM32 microcontrollers. A majority of commonly used keyboard features are broken out on pins that are best suited for the purpose. (RGB on SPI, split on USART, etc)

STM32-Reference-Keyboard, from the project README
From the project README

Main components on the STM32-Reference-Keyboard

STM32F072CBTxSRV05-4MCP1700T-3302E_SOT23

STM32-Reference-Keyboard bill of materials (BOM)

46 components, 27 distinct parts.

QtyPartRefs
1
STM32F072CBTx
U1
1
SRV05-4
U2
1
MCP1700T-3302E_SOT23
U3
1
8MHz
Y1
1
SW_SPDT
BOOT1
3
1u
C_LDO1, C_LDO2, C_VDDA2
1
4.7n
C_SHIELD1
3
100n
C_VDD1, C_VDD2, C_VDDIO2
2
4.7u
C_VDD3, C_VDDIO1
1
10u
C_VDDA1
2
30pF
C_XTAL1, C_XTAL2
1
RB060MM-60TR
D_LDO1
1
SMF9.0CA
D_PWR1
1
500mA
F1
3
Conn_01x03
J_BOOT1, J_RGB1, J_SPLIT1
1
Conn_01x04
J_I2C1
1
SWD
J_SWD1
1
SW_Push
RESET1
2
10k
R_BOOT1, R_RGB1
2
5.1k
R_CC1, R_CC2
Show 7 more
QtyPartRefs
3
4.7k
R_I2C1, R_I2C2, R_SPLIT1
2
100k
R_LDO1, R_LDO2
1
1M
R_SHIELD1
1
1.5k
R_USB1
4
SW_Push
SW1, SW2, SW3, SW4
1
HRO-TYPE-C-31-M-12
USB1
4
CD4148W
D1, D2, D3, D4

STM32-Reference-Keyboard design files

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

STM32-Reference-Keyboard: common questions

What microcontroller does the STM32-Reference-Keyboard use?

The STM32-Reference-Keyboard is built around the STM32F072CBTx, from the STM32 family.

How big is the STM32-Reference-Keyboard PCB?

The STM32-Reference-Keyboard measures 38.1 × 38.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the STM32-Reference-Keyboard?

46 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the STM32-Reference-Keyboard design files?

From the AeternusCo/STM32-Reference-Keyboard repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

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

Yes, under the terms of its Unlicense license, which AeternusCo chose for the repository.

Can I test firmware for the STM32-Reference-Keyboard 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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