Hi!
I assume the SFH6319 optocoupler from siemens will work as well as the 6N138. Am I right?
It’s a darlington type, too.
The 6N138 is not avaiable as SO8 package…
Additional question:
For what is the 1N4148 on the input of the optocoupler?
Its a standard way to connect optocoupler that way. The diode is there to prevent damage to the IC if the MIDI is connected false… I think.
I would reeeeaaally built it in.
But when the MIDI is connected false the LED inside the optocoupler should prevent itself…doesn’t it?
For false connected MIDI the diode outside is a shortcut. I cannot see any sens at the moment.
Please enlight me!