Hi friends in this video I have made an Arduino Nano based PLC . our PLC has 5 optically isolated digital inputs active high pins, and 4 relay outputs . LEDs are used to indicate the status of inputs and outputs. I think it is a useful and interesting project and I hope you like this video please like share and subscribe for more

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Components:

1 X Arduino Nano

5X PC817 Optocoupler

5X BC547 Transistors

9 X LEDS

9 X 100 Ohm Resistors

9 X 1k Resistors

5 X 10k Resistors

4x 5V Relay

10X 2 Pin Terminal Block


Circuit Diagram :

https://drive.google.com/file/d/1ROMd...

https://drive.google.com/file/d/1eHYD...


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