Relay shield for Raspberry Pi It consists of : Four High-quality Relay and loads up to 7A/240VAC or 10A/125VDC LEDs for indicating the status of each relay Standardized shield shape and design Raspberry Pi 4, 3, 2, and ZERO compatible 40-Pin Stacking Header, easy to stack it on the Pi.
Buy PiRelay: Relay shield for Raspberry Pi
Example code - https://github.com/sbcshop/PiRelay









