Original title: 300V output Optocoupler in a 5V circuit
I'm (new to this) trying to build a midi controller (in and out) with arduino and scrap. I guess I had several questions in one so I changed the title.
Schematic of the first tutorial I found
The few tutorials I found use the 6N138, I don't have it but found a PC725V. It didn't work but I realize I didn't wire it correctly. I found here that it was too slow anyway (and even the 6N138 should be replaced with the H11L1). So I have a PC705V also which seems faster (not under the 2µs range but 3-4 is close enough for testing I guess) so I'm going to try it.
Also I didn't have the 1N4148 diode so I use a V1040.
Arduino and midi are 5V and these opto are respectively made to handle 300V and 70V Collector-emitter and Collector-base output...
My initial question was: Is it just overkill (so ok for scrap) or can it be an issue? And if there is, is it manageable?
Now it is: What specs should I look in components for midi usage and what is critical/manageable for components with different characteristics?
edits: (1) added schematics, (2) new title and informations.