4 Channel 5v Relay Module Circuit Diagram. In this project we will make a 4 channel relay driver module circuit for relay based applications. 4 channel 5v optical isolated relay module this is a low level 5v 4 channel relay interface board and each channel needs a 15 20ma driver current.
As you can see it contains two pc817c based optocouplers. Now we need to collect some parts that we needed to make the diy relay module. It can be used to control various appliances and equipment with large current.
The 4 channel relay breakout is an easy way to use your arduino raspberry pi or other microcontroller to switch high voltages and high current loads.
Here we have used 12v 10amp relay in this pcb board but you can also use 5v relays. 5 volt relay i used 6 volt because i need 6 volt relay 2. It is equipped with highcurrent relays that work under ac250v 10a or dc30v 10a. The board is both 3 3v and 5v logic compatible and uses 4 digital outputs to control 4 individual relays.
