[sdiy] MIDI specifications

[Magnus Danielson]

From: "Rude 66" <r.lekx at chello.nl>
Subject: Re: [sdiy] MIDI specifications
Date: Fri, 18 Apr 2003 11:19:02 +0200

> hey magnus!

Hi Ruud!

> > May I advice you to insert a single IC to buffer things up at least. A
> single
> > 7407 will do the trick. One inverter at the input feeding the other 5
> inverters
> > who is driving a single output each.
> >
> 
> what would this do or prevent? it seems to work as it is.. a small wooden
> teabox with some holes for the midi ports i've just soldered wires from the
> input-pins to each output pin.

>From the output you have a current, it's going to drive 5 inputs now, which
means that the opto-coupler runs at the fifth of the current it is supposed to
run at, meaning less emitted signal and all that. If it works it works, but you
have just moved from one case of a limit into another. Also, all of a sudden you
want to run another pair of boxes in the same time, so you hang them in too...

By using a single chip and a small handfull resistors and a opto-coupler, you
have built yourself a propper MIDI-splitter. My point is that it isn't as far
away, so why not do it properly? As it is now you survive over the weekend, but
is it the long-time solution?

> > But who is you to complain, you have a working MIDI interface in your
> computer.
> > I currently does not have a MIDI interface which works for sure in my
> computer,
> > so I don't complain about the time-lag or anything else in MIDInese.
> 
> heh heh.. deadlines, my boy..;-) this track was supposed to be finished
> weeks ago..

;O)

Cheers,
Magnus