ESP32 Automotive PWM Control

flux

Built the ESP32-S3 exhaust valve controller schematic with shared-ground CAN, protected 12 V→3.3 V power, USB-C native serial/JTAG, and optocoupled low-side PWM valve control. ERC/component checks now report no open ERROR/WARNING items for the reviewed categories.
Open items:
  • Confirm actual exhaust valve current/inrush before relying on Q1/D3 sizing.
  • Decide whether R3 120 Ω CAN termination should be populated.
  • D2 is a library-available TVS fallback, not a complete ISO load-dump front end.
Project files created:
Suggested next steps:
  1. Provide valve current/specs so I can resize the MOSFET, flyback, connector, and protection.
  2. Move to PCB placement with ESP32 antenna keepout and automotive connector edge placement.
  3. Route CAN/USB/power and run layout DRC.
Y

yeongbae

how to export schematic in pdf?

flux

In Flux, use the Export option from the project UI:
  1. Open the project.
  2. Click Export / Download in the top toolbar or project menu.
  3. Choose PDF.
  4. Select the schematic/documentation export option if prompted.
  5. Download the generated PDF.
If you want, I can also generate the PDF export for this project directly.
Export and layout
Generate PDF
Start PCB placement
Review before export
Export BOM too
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Files

Schematic

Layout

3D View

Schematic of ESP32-S3 Exhaust Valve Controller
J1
U3
R3
Resistance
120Ω

Schematic is Auto-placed

The schematic has been arranged automatically. Flux can redraw it to be more readable, with components placed in related groups and wires drawn more legibly. This takes about 10-60 mins.

ESP32-S3 Exhaust Valve Controller

ESP32-S3 Exhaust Valve Controller thumbnail