Connecting a MIDI DIN port directly to digital logic?

[laserbeak43]

Hello,

I've pulled MIDI DIN ports off of an old M-Audio M-Box. I'm going to plug it into a breadboard

and route it to pins on my Altera DE2 FPGA Dev Kit is it OK to connect it directly to digital logic

directly off of the breadboard? Is there any protective circuitry that needs to be in between?

Thanks

Malik

this is part of someone's schematic on electro-music.com's forum

would this be all i needed to perform MIDI I/O safely?

Edited August 13, 2010 by laserbeak43

[julienvoirin]

yes it is OK

the optocoupleur at IN is done to avoid that a short circuit on device N-1 (e.g a synth plugged on 220V) destroy device N (e.g a rack module)

using gates 7400 isn't necessary in OUT ; but like this you are sure that the TTL signal will be perfect.

if you are gready you can directly connect Tx bus of device N-1 to Rx bus of device N (but there is no more short circuuit protection)