Relay Module 5V 4 channels with optocoupler SMT | KiCad Project

Four-channel 5 V relay module SMT designed for control by microcontroller digital outputs. Easily compatible with 3.3/5/12 V. Contact actuation with optocoupler and transistor isolation.

This project includes complete KiCad files, custom footprints, BOM and Gerbers. Optimized for easy assembly and industrial manufacturing.