The four-channel relay module contains four 5V relays and the associated switching and isolating components, which makes interfacing with a microcontroller or sensor easy with minimum components and connections. The contacts on
The dual-channel relay module is more or less the same as a single-channel relay module, but with some extra features like optical isolation. The dual-channel relay module can be used to switch mains powered loads from the pins of a microcontroller.
Relay is an electromechanical device that uses an electric current to open or close the contacts of a switch. The single-channel relay module is much more than just a plain relay, it comprises of components that make switching
DPDT Relay Pin Configuration
DPDT relay usually has eight pins. The default pin out of the DPDT relay varies depending on MODEL. Here we are taking HK19F-12V device as model. The pin out of HK19F is shown above.