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    Re: Question about Optocoupler H11G1

    For a switching type application you want the transistor to be fully saturated. If you're not worried about power consumption, which I guess you're not since you're using a relay, just run 15-20mA...
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    Re: Question about Optocoupler H11G1

    On page 3 it says that the minimum current transfer ratio at 5V CE is 500% so to get 35mA collector current you'd run 35/5=7mA thru the LED.
    I'd imagine that this is a rather "loose" specification...
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