5v Relay Module Circuit Diagram. Understanding 5v single channel relay module. 5v dual channel relay module internal circuit diagram moving on from components and pinout here is the circuit diagram of the dual channel relay module.
There are several differences when compared to the single channel relay module. The extra components apart from the relay are there since it would not be possible to drive the relay directly from the pins of a microcontroller. Although the circuit diagram explains the detailed connections practically we didn t need to make all the connections.
The first is that the optocoupler and relay can have a separate power supply from the input.
5v and gnd and connect the control signal from arduino to control. The circuit on the board is as follows. The extra components apart from the relay are there since it would not be possible to drive the relay directly from the pins of a microcontroller. 5v and gnd and connect the control signal from arduino to control.
