USB-C Temperature and Humidity Sensor Node Design

1:49

Evaluating unroutable fixes.

Running design review.

Analyzing the PCB layout.

Working.

Running design review.

Analyzing the PCB layout.

Addressing extraction issues.

我又做了一轮针对 unroutable 的可修复尝试，这次重点不是改原理图，而是先从 规则和可布通性 下手；这也符合 Flux 里先检查/设约束、再进入布线阶段的做法

这轮我已经改了

把 3V3 从默认很宽的线宽收敛到更现实的 0.30 mm
把 VBUS_5V 设为 0.50 mm
把相机关键线 CAM_XCLK、CAM_XCLK_SRC、CAM_VSYNC、CAM_HREF、CAM_D2 收紧到 0.15 mm / 0.10 mm keep out
把 PWM1~PWM4 收敛到 0.18 mm
把 UART0_RX 这类次关键控制线收敛到 0.15 mm
之前已经把相机簇 X1、U7、C17、C18、R9 压紧放置过了

结果

airwires 还是 118
说明问题已经不只是规则太保守，而是开始变成真实的几何拥挤/通道不足

我看到的核心原因

现在 Layout 是 50 mm x 50 mm
但布局统计给出的元件总包围盒约是 71.75 mm x 76.44 mm
更关键的是，带路由净空估算后，routing-aware fill ratio = 90.7%, 已经是 overflow
这意味着：即使把规则放松了一些，很多网线还是会因为器件间通道不够而继续 unroutable

结论当前这批 unroutable，继续只靠“再放松一点线宽/间距”收益已经很小了。
更有效的修复方向只剩两类：

方案 A：增大板子
- 例如把板子从 50 x 50 mm 提到 60 x 60 mm 或 65 x 65 mm
- 这是最直接、成功率最高的修复
方案 B：继续重排热点器件
- 重点动这些：
  - U1
  - X1
  - USB1
  - U5
  - U6
  - J2
  - J3
- 但这类修复不一定一次见效，而且风险比直接放大板框更高

我建议你现在选一个

保守稳妥：我直接帮你把板子改大一点，优先消 unroutable
坚持小尺寸：我继续帮你做第二轮热点重排，尽量不增大外形

如果你愿意，我建议下一步直接做：把 Layout 改到 60 mm x 60 mm，然后再看 unroutable 是否明显下降。

12 days

Updated 60 layout rules

0:02

Set 3V3's traceWidth to "0.30mm"

Set 3V3's minTraceWidth to "0.12mm"

Set 3V3's keepOut to "0.12mm"

Set 3V3's autoLayoutPriority to "9"

Set VBUS_5V's traceWidth to "0.50mm"

Set VBUS_5V's minTraceWidth to "0.20mm"

Set VBUS_5V's keepOut to "0.15mm"

Set VBUS_5V's autoLayoutPriority to "9"

Set CAM_XCLK_SRC's traceWidth to "0.15mm"

Set CAM_XCLK_SRC's minTraceWidth to "0.10mm"

Set CAM_XCLK_SRC's keepOut to "0.10mm"

Set CAM_XCLK_SRC's autoLayoutPriority to "10"

Set CAM_XCLK's traceWidth to "0.15mm"

Set CAM_XCLK's minTraceWidth to "0.10mm"

Set CAM_XCLK's keepOut to "0.10mm"

Set CAM_XCLK's autoLayoutPriority to "10"

Set CAM_VSYNC's traceWidth to "0.15mm"

Set CAM_VSYNC's minTraceWidth to "0.10mm"

Set CAM_VSYNC's keepOut to "0.10mm"

Set CAM_VSYNC's autoLayoutPriority to "10"

Set CAM_HREF's traceWidth to "0.15mm"

Set CAM_HREF's minTraceWidth to "0.10mm"

Set CAM_HREF's keepOut to "0.10mm"

Set CAM_HREF's autoLayoutPriority to "10"

Set CAM_D2's traceWidth to "0.15mm"

Set CAM_D2's minTraceWidth to "0.10mm"

Set CAM_D2's keepOut to "0.10mm"

Set CAM_D2's autoLayoutPriority to "10"

Set PWM1's traceWidth to "0.18mm"

Set PWM1's minTraceWidth to "0.12mm"

Set PWM1's keepOut to "0.12mm"

Set PWM1's autoLayoutPriority to "8"

Set PWM4's traceWidth to "0.18mm"

Set PWM4's minTraceWidth to "0.12mm"

Set PWM4's keepOut to "0.12mm"

Set PWM4's autoLayoutPriority to "8"

Set PWM2's traceWidth to "0.18mm"

Set PWM2's minTraceWidth to "0.12mm"

Set PWM2's keepOut to "0.12mm"

Set PWM2's autoLayoutPriority to "8"

Set PWM3's traceWidth to "0.18mm"

Set PWM3's minTraceWidth to "0.12mm"

Set PWM3's keepOut to "0.12mm"

Set PWM3's autoLayoutPriority to "8"

Set UART0_RX's traceWidth to "0.15mm"

Set UART0_RX's minTraceWidth to "0.10mm"

Set UART0_RX's keepOut to "0.10mm"

Set UART0_RX's autoLayoutPriority to "7"

12 days

ddawdd

增加盒子大小,至少保证能放下,

12 days

flux

0:54

Analyzing the PCB layout.

Working.

已把板子放大到 90 mm × 90 mm，现在肯定放得下，且布线空间充足。

Layout 改为 90 × 90 mm
仍保持 4 层板
圆角保持 2 mm
板边与 Keep Out 仍为 0.2 mm

现在的状态明显改善：

元件总包围盒约 71.7 × 76.6 mm
新板面积 8100 mm²
元件占板面积约 18.3%
已从“通道拥挤”变成“有比较充裕的布线空间”

下一步最合适的是继续做这两件事之一：

重新整理器件分布，让关键连线更短
继续针对 unroutable / airwires 做第二轮修复

如果你愿意，我就继续帮你压一轮布局，优先把相机、USB、电源、PWM 这几组再拉顺。

继续优化布局

处理布线问题

再加大板子

12 days

Updated 7 layout rules

0:08

Set Layout's sizeX to "90mm"

Set Layout's sizeY to "90mm"

Set Layout's boardShape to "rectangle"

Set Layout's cornerRadius to "2mm"

Set Layout's stackup to "Standard 4 Layer"

Set Layout's boardInsetMargin to "0.2mm"

Set Layout's keepOut to "0.2mm"

12 days

U1 IO18 - U2 SCL

Resistance

4.7kΩ

U1 IO17 - U2 SDA

U1 IO8 - USB1 DN1

U3 VDDIO - U4 AVDD

U1 IO17 - U2 SDA

U4 AVDDVCSEL - J1 PIN_4

U1 IO18 - U2 SCL

U1 TXD0 - R7 P1

Resistance

4.7kΩ

U6 VO - U1 3V3

U4 AVDDVCSEL - J1 PIN_4

R7 P2 - U5 RXD

U4 AVDDVCSEL - J1 PIN_4

R8 P2 - U5 TXD

Resistance

33 Ω

USB1 VBUS - D1 VBUS

U1 RXD0 - R8 P1

U1 IO9 - USB1 DP1

U1 IO17 - U2 SDA

Resistance

33 Ω

U4 AVDDVCSEL - J1 PIN_4

U1 IO18 - U2 SCL

U3 VDDIO - U4 AVDD

U4 GND - U5 GND

U3 GND - U4 GND

USB1 GND - D1 GND

U2 GND - U3 GND

U3 GND - U4 GND

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.8k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
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Project Name

Description

ESP32-S3 quadcopter flight controller with OV5640 24-pin DVP camera interface, Wi-Fi video link, BLE telemetry, onboard USB-C power/programming, IMU, barometer, ToF altitude sensing, lidar connector, and 4 ESC PWM outputs.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$5.50–$7.66
Digi-Key	$9.50–$13.39
LCSC	$19.54–$19.65
Mouser	$19.09
TME	$0.00
Verical	$7.53–$11.62

Controls

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