After finding out that ( See the Litany thread A litany of dumbassery - #939 by twinturbo )
- My brain was disengaged when using a 74LS14 on a 3.3V design
- even if it was correct having no power at all connected to the chip was a sure fire failure.
I bodged the power to the 3.3V rail and ordreed some 74HC14 Hex Inveretes instead.
Stage one complete, I can see the midi comming to the board
I think everything else is populated apart from the IDC boxes for the output.
I have added the details of the input circuit to a GIT repository
Rob