PCB Layout Creation Guide

flux

1:25

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Looking for "Extract components and connectivity from schematic" in IS-design-V0.2.1-e5bce2b2-3007-4615-b1a1-c454cc39cf32.pdf

Guiding schematic creation.

Based on the provided schematic PDF and Flux best-practices, here’s how to proceed to generate your PCB layout:
  1. Recreate the Schematic in Flux
    • Manually place each component listed in your PDF (e.g., STM32F030CCT6, SGM2036S-3.6, ABS25-32.768KHZ-6-T, USB A Connector, keypad, IR receiver, etc.).
    • Assign correct values to passives (e.g., 1 µF, 4.7 µF, 100 Ω, 10 kΩ).
    • Wire all nets according to the PDF connectivity (power rails +3V3, +5 V, GND; MCU I/O; oscillator; USB D+/D–; I²C, SPI; keypad lines; debug header; buzzer, etc.).
  2. Annotate and Validate
    • Label your nets exactly as in the PDF (e.g., +3V3_MCU, VBUS, SYS_SWDIO, IR_RECEIVER).
    • Run ERC to catch missing connections or decoupling caps—Flux performs real-time ERC in the inspector panel (knowledge-base guidance).
  3. Assign Footprints
    • For each component, select an appropriate PCB footprint from Flux’s library (e.g., QFN for STM32F030CCT6, SC70 for SGM2036S, through-hole for the USB A connector).
  4. Transition to PCB Editor
    • Switch to the PCB layout tab in Flux.
    • Import the netlist from your schematic to populate the board with component outlines and pads.
  5. Place Components Strategically
    • Place decoupling capacitors close to the MCU’s VDD_ pins.
    • Group the oscillator and its caps near the 32 kHz and main crystal pins.
    • Keep high-speed USB differential pair traces (USB_P/USB_N) together, matching length.
    • Position connectors (USB, keypad header) at board edges.
  6. Define Stack-Up & Ground Planes
    • Based on Flux knowledge: implement a solid ground plane on an internal layer to minimize ground-bounce and coupling (especially around switching and analog sections).
  7. Route & Optimize
    • Route power nets with wider traces (e.g., 20 mil for 100 mA+).
    • Route signal nets with standard widths (6–8 mil).
    • Ensure matched lengths for differential pairs (USB) and critical clocks (SPI, I²C).
  8. Run DRC & Finalize
    • Use Flux DRC to verify clearance, un-routed nets, and design-rule violations.
    • Address any errors flagged in the review tab.
  9. 3D Check & Export
    • Use the 3D viewer to confirm component fit and clearances.
    • Export Gerbers and BOM when complete.
Let me know if you’d like step-by-step guidance on any of these stages or if you want me to help set up the schematic’s initial components and nets.
154 days
calm-81

calm-81

@help how do I import my schematic nets into the PCB editor?
154 days

flux

0:42

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Reading docs for: "how do I import my schematic nets into the PCB editor"

Analyzing PCB Editor FAQs.

Confirming relevance of PCB entry.

Here’s the most relevant entry I found in the Flux documentation:
How do I start the PCB layout after completing the schematic?
Click the PCB tab. Your schematic components become footprints on the board. Define the board outline and arrange components based on the ratsnest. For more information checkout this Getting started tutorial
Source: Source
154 days

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GND
TX GPIO1
3V3
A0
D8 GPIO15
RSV2
RX GPIO3
D5 GPIO14
D4 GPIO2
D2 GPIO4 SDA
D3 GPIO0
EN
D7 GPIO13
SD2 GPIO9
SCLK GPIO6
3V3
D6 GPIO12
SD0 GPIO7 MISO
GND
SD1 GPIO8 MOSI
RST
RSV1
D0 GPIO16
CMD GPIO11
D1 GPIO5 SCL
3V3
GND
GND
VIN
SD2 GPIO10
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Nodemcu-12E ESP8266 cDtH

Nodemcu-12E ESP8266 cDtH
Description

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Last updated by stanleaf
1 Contributor(s)
stanleaf

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Properties

Manufacturer Part Number
Nodemcu-12E ESP8266
Designator Prefix
U
Part Type
Microcontroller

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