Most recentlyMost popularMost liked ADD PROJECT KeywordTAGPosted ByAuthorHardware ComponentsSoftware Name Relay Driver Board, 21 Channels, 12V, Arduino 2560 shield, Node Red, MQTT, W5100 Ethernet In this video I will continue with my home automation system. I created a 21 channel 12v relay driver board ...Read Moreposted by mathad 548 0 0 on Relay Driver Board, 21 Channels, 12V, Arduino 2560 shield, Node Red, MQTT, W5100 Ethernet