Relay Module Schematic Diagram. A wiring diagram is a simplified traditional pictorial depiction of an electrical circuit. Now we have all the parts to make a diy relay module.
When you need to drive a large power load you can take the jumper cap off and connect an extra power to ry vcc to supply the relay. Moving on from components and pinout here is the circuit diagram of the dual channel relay module. Here we have used 12v 10amp relay in this pcb board but you can also use 5v relays.
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.
Now we have all the parts to make a diy relay module. Vcc and ry vcc are also the power supply of the relay module. Don t skip this step it is necessary to avoid mistakes when soldering into a pcb and check if it is works. In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor.
