4 Channel Relay Module
Relay Module provides a solution for controlling high current devices that
cannot be controlled by the Arduino’s Digital I/O pins due to their current and
The Relay Module features four high quality relays and
provides NO/NC interfaces, four dynamic LED indicators to show the on/off state
of each relay, and the standardized shield form factor to provide a smooth
connection to the Arduino/Seeeduino board or other Arduino compatible boards.
Uno/Leonardo/Seeeduino compatible; Other board or microcontroller via jumper
via digital I/O pins 4,5,6, and 7
shield shape and design
working status indicators for each relay
NO (Normally Open), and NC (Normally Closed) relay pins for each relay.