I need a custom all-in-one PCB for a 200 kg weighing platform.
The board must combine:
ESP32
high-precision load-cell ADC
load-cell excitation/power circuit
filtering and protection
Wi-Fi
USB power/programming
calibration and weighing firmware
Load Cell Input
My weighing platform has a standard 4-wire load-cell connection:
E+ — Excitation+
E? — Excitation?
A+ — Signal+
A? — Signal?
I want to connect these four wires directly to screw terminals on the PCB.
The board should support a 200 kg full-bridge strain-gauge load cell / platform scale, normally around:
350 Ω bridge
approximately 1–3 mV/V sensitivity
4-wire Wheatstone bridge
The exact system should be suitable for common industrial platform load cells