PCB Layout Creation Guide

flux

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.
calm-81

calm-81

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

flux

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
Refresh PCB nets
Re-export netlist
Sync net classes
Verify nets imported
Show unrouted nets
  • Generic Inductor
    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
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Nodemcu-12E ESP8266 cDtH

NodeMCU V3 ESP8266 ESP-12E is WiFi development board that helps you to prototype your IoT product with few Lua script lines, or through Arduino IDE. The board is based on ESP8266 ESP-12E variant, unlike other ESP-12E, you won’t need to buy a separate breakout board, usb to serial adapter, or even solder it to a PCB to get started, you will only need a usb cable (Micro USB).

Properties

Nodemcu-12E ESP8266

components101.com/development-boards/nodemcu-esp8266-pinout-features-and-datasheet

U

Microcontroller

Pricing & Availability

Distributor

Qty 1

Controls