I'm an electronics novice, doing it as a hobby.
I've got a project where I'm trying to connect an optocoupler to a 12v logic signal line.
The optocoupler (Vishay 4N25) says it has a maximum forward current of 60mA.
I want to know if the optocoupler will draw too much current from the logic line and disrupt the other devices also listening in on the data signal.
Now because of my flakey electronics knowlege I'm not too sure of the following:
The optocoupler does not dictate the current passing through it right?
The current passing through the optocoupler is the line voltage (12v) divided by resistance (? ohms) - from what I can remember from school. So where do I find out the resistance of the optocoupler, or do they mean resistance of the whole circuit?
I've got a project where I'm trying to connect an optocoupler to a 12v logic signal line.
The optocoupler (Vishay 4N25) says it has a maximum forward current of 60mA.
I want to know if the optocoupler will draw too much current from the logic line and disrupt the other devices also listening in on the data signal.
Now because of my flakey electronics knowlege I'm not too sure of the following:
The optocoupler does not dictate the current passing through it right?
The current passing through the optocoupler is the line voltage (12v) divided by resistance (? ohms) - from what I can remember from school. So where do I find out the resistance of the optocoupler, or do they mean resistance of the whole circuit?