HardLabs

X-Watch

Han-ZenX·X-Watch·hardware/schematic/v1.0/XWatch_Rev2.0/XWatch_Rev2.0.kicad_pcb

X-Watch PCB layout, top view — open source STM32 board by Han-ZenX

About the X-Watch PCB

X-Watch is an open source STM32 PCB design by Han-ZenX, published on GitHub under the MIT license. It is a 2-layer board measuring 36 × 36 mm, with 118 components from 36 distinct parts.

Its main chip is the STM32U5G9NJH6Q, from the STM32 family. Other key parts include the nRF52833-QDAA-R, GD25LQ128EWIGR, DA9168, TPS62840DLCR and MAX17048G_T10. By type, the board carries 74 capacitors, 23 resistors, 15 ICs, 3 inductors, 2 crystals and 1 diode.

It belongs with the wearables designs in this gallery.

From the project

A Fully Customizable Open-Source Smartwatch

X-Watch 是一款开源智能手表项目，主控芯片为 STM32L4R9AII6U，图形界面基于 TouchGFX 开发。本仓库统一管理硬件设计、嵌入式固件、配套软件、文档与测试。

- 超低功耗：STM32L4+ 系列，适合电池供电的穿戴设备。 - 图形能力完整：片上集成 LTDC、MIPI DSI Host、Chrom-ART 加速器和 GFXMMU（适合圆形屏帧缓冲），无需外置图形芯片。 - TouchGFX 官方支持：ST 提供 STM32L4R9I-DISCO 参考设计（圆形 AMOLED 屏），可作为软硬件起点，手册见 docs/references/Rev1.0。

完整的架构说明见 docs/architecture/architecture.md。

- STM32CubeMX：外设与时钟配置 - TouchGFX Designer：UI 设计与代码生成 - GCC ARM 工具链（arm-none-eabi-gcc）、CMake ≥ 3.20、Ninja - KiCad：打开 hardware/schematic/v1.0/XWatchRev1.0/` 下的工程 - 调试器：ST-LINK

Main components on the X-Watch

nRF52833-QDAA-RSTM32U5G9NJH6QGD25LQ128EWIGRDA9168TPS62840DLCRMAX17048G_T10LSM6DSOXTRLIS2MDLTRSM03B-SRSS-TB_LF_SN_PLPS27HHWTROPT3001DNPRMAX30101EFD_TDRV2605LDGSRSK6018D4-33AXE530127-DO0143FMST02

X-Watch bill of materials (BOM)

118 components, 36 distinct parts.

QtyPartRefs
1
nRF52833-QDAA-R
IC1
1
STM32U5G9NJH6Q
STMicroelectronics
U1
1
GD25LQ128EWIGR
GigaDevice Semicon Beijing
U2
1
DA9168
U3
1
TPS62840DLCR
Texas Instruments
U4
1
MAX17048G_T10
Analog Devices Inc./Maxim Integrated
U5
1
LSM6DSOXTR
STMicroelectronics
U6
1
LIS2MDLTR
STMicroelectronics
U7
1
SM03B-SRSS-TB_LF_SN_P
JST
U8
1
LPS27HHWTR
STMicroelectronics
U9
1
OPT3001DNPR
Texas Instruments
U10
1
MAX30101EFD_T
STMicroelectronics
U11
1
DRV2605LDGSR
Texas Instruments
U12
1
SK6018D4-33
Suntek
U13
1
AXE530127-DO0143FMST02
U14
1
32.768KHZ
NDK
X1
1
16MHZ
Yajingxin
X2
1
RB520S-30
hongjiacheng
D1
3
2.2uH
L1, L2, L3
2
5.6pF
C1, C2
Show 16 more
QtyPartRefs
2
10pF
C3, C4
3
4.7uF
C5, C15, C33
10
10uF
C6, C9, C10, C16, C17, C30, C46, C59 +2
6
100nF
C7, C14, C49, C73, C75, C77
1
47nF
C8
5
2.2uF
C11, C12, C13, C41, C42
12
1uF
C18, C19, C34, C36, C61, C62, C64, C65 +4
32
100nF
C20, C21, C22, C23, C24, C25, C26, C27 +24
1
220nF
C52
3
100K
R3, R17, R19
4
4.7K
R4, R5, R13, R14
11
10K
R6, R7, R8, R15, R16, R18, R20, R21 +3
1
24.9 k 1%
R9
1
38.3 k 1%
R10
2
2.2K
R11, R12
1
0
R22

X-Watch design files

The KiCad project lives in the Han-ZenX/X-Watch repository on GitHub; these links point at the commit this page was built from.

X-Watch: common questions

What microcontroller does the X-Watch use?

The X-Watch is built around the STM32U5G9NJH6Q, from the STM32 family.

How big is the X-Watch PCB?

The X-Watch measures 36 × 36 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the X-Watch?

118 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the X-Watch design files?

From the Han-ZenX/X-Watch repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the X-Watch design in my own project?

Yes, under the terms of its MIT license, which Han-ZenX chose for the repository.

Can I test firmware for the X-Watch 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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