ESP32 PCB Design for Pulse Control

flux

0:16

Work done
  • Renamed the project to ESP32 Golf Ball Dispenser Interface and updated the description for the new single-input golf ball dispenser board.
  • Refactored the schematic around U1 to keep the protected 12 V to 24 V input chain, preserve the 5 V then 3.3 V rails through U2 and U3, and keep optional UART access on J3.
  • Reworked the field I/O to one conditioned coin pulse input on J1 using Q1, R1, R3, R5, and C9.
  • Added the relay output path with K1, Q2, D3, and R2, plus retained the open-collector output on Q3 and assigned J2 as relay NO/COM/NC plus OC_OUT.
  • Added SW1 as the user-select switch input to the ESP32 and updated the internal design documentation with the new ESP32 pin mapping and architecture.
  • Reapplied the required 100 mm x 80 mm rectangular layout and Standard 4 Layer stackup, then exported updated Gerbers.
Success criteria review
  • ✅ The schematic now reflects the new golf ball dispenser concept: one conditioned pulse input, protected power entry, relay dry-contact path, open-collector output, ESP32-WROOM control, and optional UART access.
  • ✅ The layout size is set to 100 mm x 80 mm with a 4-layer stackup.
  • ✅ Updated Gerber files were generated: esp32-golf-ball-dispenser-interface-gerbers.zip
  • ❌ The layout is not yet complete for manufacturing: DRC still reports 42 airwires, so routing and placement cleanup remain.
  • ❌ ERC still reports 21 floating pins, including unused ESP32 pins and two spare terminal positions on J1.
  • ❌ A BOM export file could not be generated in this run, so the final BOM deliverable is still missing.
Next steps The remaining work is PCB placement and routing cleanup plus ERC cleanup so the board can be exported as a fully manufacture-ready package. I can continue by reducing the floating-pin warnings, tightening the connector assignments, and preparing the final BOM export once the export issue is resolved.
Revise schematic first
Document pin mapping
Check existing board
17 days
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ESP32 Golf Ball Dispenser Interface thumbnail
Reusable ESP32-WROOM golf ball dispenser interface board with protected 12V to 24V input power, one conditioned coin pulse input, SPDT relay dry-contact output, open-collector output, Bluetooth pulse generation, screw-terminal field wiring, and optional UART programming access.

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