I'm looking for help and unfortunately stuck for time on a project, so hoping someone wouldn't mind helping me out.
I am trying to calculate the resistor value required for an opto-isolator circuit. I am powering a 24DC magnetic reed switch passing ground through a Siemens SFH615A:
Can someone recommend a resistor value, thank you very much.
I have used the calculator available here: http://led.linear1.org/1led.wiz with a 24V supply, 1.5 forward voltage and 60mA forward current.
I would be grateful if someone could double check