Ever wanted to automate your home by controlling AC appliances like light or fan? Well, this HAT might be perfect for you if you are using Raspberry Pi as the controller. This HAT Relay Board gives your RPi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent.
Board Overview:
Raspberry Pi GPIO interface: Stack on Raspberry Pi
Relay screw terminal: for connecting target devices, AC or DC load.
Relays
Photocoupler: PC817
Relay indicator LEDs
LED on: relay NC is opened, NO is closed
LED off: relay NC is closed, NO is opened
Power indicator
Relay control jumper
short the jumper: control the relays by default I/Os used in the example code
open the jumper: control the relays by custom I/Os through jumper wires