DIY Relay Module Making

First Watch The Full Video Then You will understand Everything.

Step 1: 12V Relay

Buying Link

https://ouo.io/8L8eC6

https://amzn.to/2IUHUhA

Step 2: PCB Board

I have used Dot PCB Board.

Link

https://ouo.io/S3Kmfs

https://amzn.to/2s02OSD

Step 3: Any PNP Transistor

Use any PNP Transistor Which Can Handle 20mA At least.

I have used BC557

Link:

https://ouo.io/IV0A4J

https://amzn.to/2GE71jg

Step 4: PC817 Opto-Coupler

PC817 Opto-Coupler

https://ouo.io/Q3uonB

https://amzn.to/2IVhJXX

Step 5: Resistor

10k Resistor Link

https://ouo.io/KZ0gaL

https://amzn.to/2s03qrp

1k Resistor Link

https://ouo.io/RIU8YS

https://amzn.to/2s1FzGX

Step 6: PCB Mount Screw Terminal Block

2 PIN PCB Mount Screw Terminal Block Connectors - Green

Link https://ouo.io/c41zSS

Step 7: Push Switch

Push Switch Link https://ouo.io/3MeONr

Step 8: Indicator LED

Green LED Link https://ouo.io/kIXm25

Step 9: Full Made Board From Front Side

Step 10: Soldering of Each Channel

Step 11: Circuit Diagram

Step 12: Single Module Connection With Arduino.