Industrial STM32 4-Layer PCB

PCB Design – STM32

I need an experienced PCB designer to create a 4-layer industrial PCB

Requirements:

* MCU: STM32
* 4G Module: SIM7600G (GPS + LTE)
* Power: 12V → 5V (LM2596), 3.3V (AMS1117), battery backup
* Inputs: 3× CT + 3× PT (with protection & filtering)
* Output: Relay-based MCCB trip (optocoupler isolated)
* Extra: MPU6050 (I2C), LEDs, buttons, UART debug

Key Design Points:

* 4-layer PCB (GND + power planes)
* Proper HV/LV isolation (8mm clearance)
* EMI/EMC-friendly layout
* RF layout for 4G antenna (50Ω)

Deliverables:

* PCB design files (KiCad/Altium/EasyEDA)
* Gerber + BOM + Pick & Place
* Ready for manufacturing

Looking for:

* Experience in industrial PCB design
* Knowledge of power + RF + protection circuits

Apply with:

* Similar past work
* Tool you use
* Timeline & cost