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X32promicro

74th·x32promicro·f103cxt6/x32promicro.kicad_pcb

X32promicro PCB layout, top view — open source STM32 board by 74th
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About the X32promicro PCB

X32promicro is an open source STM32 PCB design by 74th, published on GitHub under the MIT license. It is a 2-layer board measuring 17.8 × 33 mm, with 26 components from 19 distinct parts.

Its main chip is the STM32V103C8T6, from the STM32 family. Other key parts include the AMS1117-3.3. By type, the board carries 7 capacitors, 7 resistors, 4 connectors, 2 ICs, 1 crystal and 1 fuse.

From the project

x32micro - STM32F103CxT6, CH32V203C8T6 ProMicro size board

ProMicro サイズの STM32、CH32 など STM32F103CxT6 互換ピンアウト MCU 用 ProMicro 型開発ボード

- Shop Site (BOOTH 販売ページ) - WCH CH32V203C8T6 - ST STM32V103C8T6

- WCH: CH32V203C8T6 - STMicro: STM32F103C8T6

- Arduino UNO R4-like SWD with UART 1.26mm 10-pin added. VCC is 3.3V. - Added Fuse to power supply. - Damping resistor added to USB DM/DP - Added pull-up resistor on USB DP to indicate USB 1.1 Full Speed - Omit the LowPower crystal (because the built-in RC clock can be used). - Omitted the BOOT0 button (since it is rarely used) and added through-hole access to BOOT0 and 1 - Changed pin assignments

X32promicro, from the project README
From the project README

Main components on the X32promicro

STM32V103C8T6AMS1117-3.3

X32promicro bill of materials (BOM)

26 components, 19 distinct parts.

QtyPartRefs
1
STM32V103C8T6
U1
1
AMS1117-3.3
U2
1
8M
Y1
1
USB2.0_C_v3
J1
1
SWD-MCU_Side-10Pin
J2
1
ProMicro-LeftPin-NoGND
J3
1
ProMicro-RightPin
J4
2
1Pin
CH1, CH2
1
Polyfuse
F1
1
SW_Push
SW1
1
Blue
D1
1
10u
C1
3
100n
C2, C4, C5
1
2.2u
C3
2
22p
C6, C7
2
10k
R1, R7
2
5.1k
R2, R3
1
1.5k
R4
2
27
R5, R6

X32promicro design files

The KiCad project lives in the 74th/x32promicro repository on GitHub; these links point at the commit this page was built from.

X32promicro: common questions

What microcontroller does the X32promicro use?

The X32promicro is built around the STM32V103C8T6, from the STM32 family.

How big is the X32promicro PCB?

The X32promicro measures 17.8 × 33 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the X32promicro?

26 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the X32promicro design files?

From the 74th/x32promicro repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the X32promicro design in my own project?

Yes, under the terms of its MIT license, which 74th chose for the repository.

Can I test firmware for the X32promicro 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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