Arduino 4 Relay Module Schematic. It can be used to control various appliances and equipment with large current. A relay is commonly used to interface a low current circuit to a higher current circuit.
8 channel relay module schematic. Upload the sketch 4 channel relay demo to the arduino uno or atmega2560 board. Here s the holy grail of iot.
The shield features four relays each relay provides 2 pole changeover contacts no and nc.
It can be used to control various appliances and equipment with large current. In this arduino relay tutorial i will show you how to use a relay with microcontrollers. Controlling a relay module with the arduino is as simple as controlling any other output as we ll see later on. Introducing the relay module.
