Dear All,
Kindly advise how to use optocoupler 4N25 to isolate microcontroller minimum system to Contactors :
1. Output from Port 0.0 to Optocoupler
2. Ouput from Optocoupler to drive contactor
Questions :
1. What should i do with the base pin of the transistor
2. What is the value of the pull up resistor to drive 12V DC to contactor
Please comment.
Thanks
Mansur
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