4-layer PCB Design and Simulation
Budget: $10 – $30 USD
Please start your proposal with the phrase 'Hardware Is Hard' so I know you read the full scope. Also, you must attach 2-3 screenshots of your own manufactured multi-layer PCB layouts.
Scope of Work & Deliverables
-Schematic Optimization & Electrical Simulation (Must be finalized and approved BEFORE PCB Layout)
Circuit & Component Simulation: Validate and simulate critical sub-circuits (using LTspice, PSpice, or equivalent). Optimize the power delivery network (PDN) between the HLK Network module, power module, and the ESP32 to ensure noise filtering, decoupling, and voltage stability.
Schematic Audit: Comprehensive review of the existing schematic for signal integrity, protection circuits, and component ratings.
Hardware Protection: Ensure proper implementation of hardware protection (TVS diodes, fuses, surge protection) suitable for continuous 24/7 outdoor operation.
Milestone 1 Sign-off: Optimized schematic and electrical simulation reports must be reviewed and officially approved by the client before any PCB routing begins.
-PCB Design, Layout & Thermal Simulation
High-Power & Logic Separation: Isolate high-power AC/DC tracks from low-voltage logic/RF signals (ESP32 and HLK) to prevent EMI/EMC interference. Adhere to strict Creepage and Clearance standards for safety.
RF Layout & Impedance Matching: Implement strict 50-Ohm impedance control for RF signal traces and adhere to official Espressif guidelines for ESP32 antenna keep-out zones.
Thermal Simulation & Management (High Priority): Perform full Thermal Simulation (FEA/CFD) under maximum continuous 24/7 load. Implement mitigation strategies (thermal vias, copper pours, or heatsinks), especially around the HLK module and power tracks.
Testability: Integrate dedicated Test Points (ICT) for critical power rails (3.3V, 5V, GND) and an auto-reset flashing interface (UART/USB).
Required Deliverables
Upon project completion, the freelancer must deliver a comprehensive, production-ready engineering package:
Design Source Files: Fully organized, unencrypted Schematic and PCB Layout source files in [Altium Designer / KiCad] format, along with custom component libraries.
Manufacturing & Production Files (Fabrication Package): Comprehensive PCB Fabrication Notes & Stackup Specification: Clear definition of substrate material (High-Tg FR4, minimum Tg150), required surface finish (ENIG mandatory for outdoor reliability), dielectric thickness, and strict copper weight specifications (e.g., 1 oz for signal layers, 2 oz for power layers).
Design Rule Check (DRC) Verification: Delivery of native DRC and ERC validation reports from the EDA tool showing Zero Errors and Zero Warnings.
Standard Compliance: Complete layout must strictly adhere to IPC-A-610 Class 2 manufacturing tolerances.
Clear Polarity and Pin 1 Markings: Ensure flawless and unambiguous silkscreen/assembly layer indicators for all polarized components (diodes, ICs, electrolytic capacitors).
Gerber Files (RS-274X or X2), NC Drill files, Pick and Place (Centroid) file, Solder Paste (Stencil) Files, and Panelization Support (including fiducials and break-away tabs).
Production-Ready BOM: Structured Excel/CSV BOM including exact Manufacturer Part Numbers (MPN), sourcing links (DigiKey/Mouser), and at least one drop-in alternative/substitute for critical components to secure the supply chain.
Validation Packages:
Electrical: Native circuit simulation files (.asc/.cic) and exported transient analysis waveforms.
Thermal: Native thermal simulation source files (ANSYS Icepak, SolidWorks Flow, or Altium TRM) + Comprehensive PDF Thermal Analysis Report showing 3D heat maps under peak continuous load + Video Demo.
3D Mechanical Models: High-accuracy STEP file (.step) of the fully populated PCB assembly for enclosure integration and mechanical clearance checks.
Engineering Documentation: A concise design note (PDF) documenting the electrical isolation strategy, specifying the exact creepage and clearance distances used.
Scope of Work & Deliverables
-Schematic Optimization & Electrical Simulation (Must be finalized and approved BEFORE PCB Layout)
Circuit & Component Simulation: Validate and simulate critical sub-circuits (using LTspice, PSpice, or equivalent). Optimize the power delivery network (PDN) between the HLK Network module, power module, and the ESP32 to ensure noise filtering, decoupling, and voltage stability.
Schematic Audit: Comprehensive review of the existing schematic for signal integrity, protection circuits, and component ratings.
Hardware Protection: Ensure proper implementation of hardware protection (TVS diodes, fuses, surge protection) suitable for continuous 24/7 outdoor operation.
Milestone 1 Sign-off: Optimized schematic and electrical simulation reports must be reviewed and officially approved by the client before any PCB routing begins.
-PCB Design, Layout & Thermal Simulation
High-Power & Logic Separation: Isolate high-power AC/DC tracks from low-voltage logic/RF signals (ESP32 and HLK) to prevent EMI/EMC interference. Adhere to strict Creepage and Clearance standards for safety.
RF Layout & Impedance Matching: Implement strict 50-Ohm impedance control for RF signal traces and adhere to official Espressif guidelines for ESP32 antenna keep-out zones.
Thermal Simulation & Management (High Priority): Perform full Thermal Simulation (FEA/CFD) under maximum continuous 24/7 load. Implement mitigation strategies (thermal vias, copper pours, or heatsinks), especially around the HLK module and power tracks.
Testability: Integrate dedicated Test Points (ICT) for critical power rails (3.3V, 5V, GND) and an auto-reset flashing interface (UART/USB).
Required Deliverables
Upon project completion, the freelancer must deliver a comprehensive, production-ready engineering package:
Design Source Files: Fully organized, unencrypted Schematic and PCB Layout source files in [Altium Designer / KiCad] format, along with custom component libraries.
Manufacturing & Production Files (Fabrication Package): Comprehensive PCB Fabrication Notes & Stackup Specification: Clear definition of substrate material (High-Tg FR4, minimum Tg150), required surface finish (ENIG mandatory for outdoor reliability), dielectric thickness, and strict copper weight specifications (e.g., 1 oz for signal layers, 2 oz for power layers).
Design Rule Check (DRC) Verification: Delivery of native DRC and ERC validation reports from the EDA tool showing Zero Errors and Zero Warnings.
Standard Compliance: Complete layout must strictly adhere to IPC-A-610 Class 2 manufacturing tolerances.
Clear Polarity and Pin 1 Markings: Ensure flawless and unambiguous silkscreen/assembly layer indicators for all polarized components (diodes, ICs, electrolytic capacitors).
Gerber Files (RS-274X or X2), NC Drill files, Pick and Place (Centroid) file, Solder Paste (Stencil) Files, and Panelization Support (including fiducials and break-away tabs).
Production-Ready BOM: Structured Excel/CSV BOM including exact Manufacturer Part Numbers (MPN), sourcing links (DigiKey/Mouser), and at least one drop-in alternative/substitute for critical components to secure the supply chain.
Validation Packages:
Electrical: Native circuit simulation files (.asc/.cic) and exported transient analysis waveforms.
Thermal: Native thermal simulation source files (ANSYS Icepak, SolidWorks Flow, or Altium TRM) + Comprehensive PDF Thermal Analysis Report showing 3D heat maps under peak continuous load + Video Demo.
3D Mechanical Models: High-accuracy STEP file (.step) of the fully populated PCB assembly for enclosure integration and mechanical clearance checks.
Engineering Documentation: A concise design note (PDF) documenting the electrical isolation strategy, specifying the exact creepage and clearance distances used.