I’ll try to get some on my next DigiKey order, but I figure they’re on something. The PC900 seems to be in every MIDI device I’ve ever opened, but nothing I feel like destroying. Does anything else use either of those? 4N35 is all over the non-MIDI devices too.
-Thanks
The PC900 is hard to get here in germany (not sure if this is a discontinued product), therefore I decided to use the 6N138
6N139 works also, I cannot give a statement for other optocouplers
Best Regards, Thorsten.
Thorsten, Thanks!
They’re cheap to order, I just don’t have enough of an order built up right now. It seems I bought 6N138’s here a while back. Our real electronics store closed down and keeps re-opening under different names in different locations (usually harder to reach each time). If I can figure out where they are for this week, I’ll see if they have them.
I notice when doing web searches for those part names, 90% of the results came back with MIDI projects. I was hoping they’d be in a bunch of other stuff as well.
                    -George
Don’t use a 6N138/9! They’re linear devices. The PC900 isn’t really up to much either. The HCPL2200 is much the best! See here:
http://discourse.midibox.org/t/topic/7182
Best
Steve G-S