bryggapa skrev:Fritzing will probably work out for you, but I'd recommend KiCAD over Eagle if you want to step it up later on.
I don't want to step on AHm's toes here, so he can correct me if I'm wrong
a) You are right. What is important is to check the datasheet for the optocoupler you are using, to make sure you're driving it correctly.
b) I think you are right here also. The opto's should go on the collector side.
Sorry for the late reply, been busy with other stuff and vacation. You are right that would have been better (more correct). Now I have some improvements for for the future