4x4 Relay Matrix Control Using an 8-Channel Relay Module

This project demonstrates how to control 16 LEDs using a 4x4 relay matrix and an 8-channel relay module. By utilizing 8 GPIO pins to control both rows and columns, each LED in the matrix can be individually activated through specific combinations of relays. This method showcases efficient control of multiple LEDs with reduced wiring complexity, though it uses relays typically suited for higher-power applications.