How To Make a 2-Channel Relay Module

Hi Friends in this tutorial I have made a simple Relay Module with 2 Outputs.

[@shortstalkingtomfunny7582]

Hi pro i your subscriber. Nrf module how to connect ? two nrf module please tell pro

[@s05w56]

Hello @Smad lab,
im now specialist in this field but im here to learn. I have a question. Is there any special reason to why you use the optokoppler in the circuit. Can`t the transistor be controlled by the arduino itself?

[@asammad835]

You can also used transistor in this circuit.But i used optocoupler in this circuit to increase its efficiency