been trying to get this schematic alongside a few other MIDI IN ones to work but so far no results. Apologies if this is a stupid question but am I right in thinking that with this schematic pins 6 and 4 go to GND? and pin 5 goes first to PIN 0 and then to +5v (via 3.3k resistor)?
I have been trying to find a suitable solution and have also come across this in the process:
http://www.spikenzielabs.com/SpikenzieLabs/Serial_MIDI.html
which is a Serial to Midi converter - haven't fully tested yet but could be a solution also - however this requires the MIDI data to be sent over USB and that also means a computer, I am interested in that to an extent but I would also like to be able to build standalone units that can be controlled by simple (and cheap) midi keyboards.