PC MIDI Cable

Design Concepts
1

Hi, this one’ been bugging me for the last hour or so. What’s the correct wiring for the midi output from the 15 pin port on a soundcard.

I’ve seen a diagram on ucApps but can’t find it again.

Searching on google just gives 5 pin din -> 5 pin din.

Cheers, Matt Carus

2

Hi.

That soundcard (Joystick)/midi port needs a special adapter cable or “soundblaster midi cable” for Google :wink:

Like:

http://www.cryogenius.com/hardware/sbmidi/

or

http://www.midwest-analog.com/diysb16.html

And as you can see it’s not that special at all.. :wink: Nice practice for midibo.. other DIY projects.

t. Samppa

3

OK, cheers, that circuit looks familiar.

More parts to buy…

Matt

4

Hi

I made my MIDI cable from:

http://home.insightbb.com/~tomatwell/midi/pc_midi.gif

It don’t have buffer on the midi out, but it works good for me. Without the buffer IC i was able to stuff the optocoupler and the other components in the housing for the DB15 connector  :)

Another question:

I didn’t get hands on 33pF caps for the XT resonance circuit on the CORE in my eager to get the CORE running so i stuffed it with 2*22pF instead. Anyone see problems with that ?

/Wise

5

Ok,

I once tried to stuff one of those circuits with buffer IC in to DB15 shell (point to point wiring) and gave up :wink: Maybe I should have another attempt.. maybe eith that using transistors as buffer.

I don’t know about those caps.. BUT It’s simply microcontrollers external resonator clock, so If got it running with 22pF I don’t see any reason to change those :wink:

t. Samppa