First connect neutral wire from the supply to neutral connector on the socket.
Arduino power control relay.
Without the jumper cap you need to provide an independent power source to power up the relay s electromagnet through the jd vcc pin.
Control up to 65 280 relays with your arduino.
Use the io expander and relay expander with the arduino to control up to 65 280 relays.
Here to turn on the relay with arduino we just need to make that arduino pin high a0 in our case where relay module is connected.
That configuration physically isolates the relays from the arduino with the module s built in optocoupler.
The control pin for the relay is connected to the pin 8 of arduino.
In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor.
Finally the power outlet box.
The connections between the relay module and the arduino are really simple.
In this quick arduino tutorial i will explain how you can control a relay using the arduino board one 1k and one 10k resistors 1 bc547 transistor one 6v or 12v relay one 1n4007 diode and a 12v fan.
The detail instruction code wiring diagram video tutorial line by line code explanation are provided to help you quickly get started with arduino.
Coming to the relay the 5v and gnd pins for the relay module are given from the arduino uno.
Project tutorial by christian.
Learn how to use relay with arduino how relay works how to connect relay to arduino how to code for relay how to program arduino step by step.
We need to open the box and make connections.