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Roly

szf2020·Roly·hardware/roly-power-io/roly_power_io.kicad_pcb

Roly PCB layout, top view — open source STM32 board by szf2020
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About the Roly PCB

Roly is an open source STM32 PCB design by szf2020, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 130 × 100 mm, with 56 components from 34 distinct parts.

Its main chip is the J_MCU ->STM32G474, from the STM32 family. Other key parts include the SN65HVD230 and TCA9548APWR. By type, the board carries 17 resistors, 16 connectors, 13 capacitors, 6 diodes, 2 ICs and 1 transistor.

From the project

Roly — 50cm 双轮自平衡 AI 陪伴机器人 · 开源全栈(PCB/CAD/固件/ROS2/平衡控制/感知/表情),从零端到端

全程代码生成 + 命令行(无 GUI 点选),可复现。原理图 → 布局 → 布线 → Gerber。

- 45A VBAT/GND 不走线,走整面覆铜(IPC-2221:45A@2oz 需 28.8mm 线宽 → 不现实)。见 功率/热分析。 - 无有源反接保护(LTC4359 在审计中发现会上电死锁)→ keyed XT60 + 外部保险/急停。见 审计。 - 接线/引脚定义见 接线速查;电流/续航见 powerbudget.py`。

ERC 0 错 · DRC 0 unconnected(库/丝印 warnings 豁免)· Gerber 已导出。JLCPCB DFM 待实物下单时跑通存档(审计退出条件 ⑥)——在此之前不称"可下单"。

Main components on the Roly

SN65HVD230TCA9548APWR

Roly bill of materials (BOM)

56 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN65HVD230
U1
1
TCA9548APWR
U2
1
MMBT3904
Q1
1
J_BAT XT60(经开关/急停/保险)
J1
1
J_M1 C620-1
J2
1
J_M2 C620-2
J3
1
J_BUCK12 22V->12V/15A
J4
1
J_BUCK5 22V->5V/6A
J5
1
J_BUCK33 22V->3V3/1A
J6
1
J_SERVO 12V->舵机适配器
J7
1
J_SBC 5V->Rock5B+
J8
1
J_CAN ->C620
J9
1
J_TOF1 VL53L1X
J10
1
J_TOF2 VL53L1X
J11
1
J_TOF3 VL53L1X
J12
1
J_TOF4 VL53L1X
J13
1
J_TOF5 VL53L1X
J14
1
J_IMU ICM-42688
J15
1
J_MCU ->STM32G474
J16
1
Buzzer 5V
BZ1
Show 14 more
QtyPartRefs
1
SMAJ33A
D1
2
CAN ESD 24V
D2, D3
1
1N4148(降 VDD~4.4V 配 3.3V DIN)
D4
1
WS2812B
D5
1
1N4148
D6
2
470uF/35V
C1, C2
4
1uF/50V
C3, C4, C5, C6
3
10uF
C7, C8, C11
4
100n
C9, C10, C12, C13
1
120
R1
2
10k
R2, R17
12
4.7k
R3, R4, R5, R6, R7, R8, R9, R10 +4
1
1k
R15
1
100k
R16

Roly design files

The KiCad project lives in the szf2020/Roly repository on GitHub; these links point at the commit this page was built from.

Roly: common questions

What microcontroller does the Roly use?

The Roly is built around the J_MCU ->STM32G474, from the STM32 family.

How big is the Roly PCB?

The Roly measures 130 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Roly?

56 components, from 34 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Roly design files?

From the szf2020/Roly repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Roly design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which szf2020 chose for the repository.

Can I test firmware for the Roly 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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