Analogue-sequencer

Hi Allan,

> I haven't built a front panel for it yet, however one feature I 
> would like to add are some extra midi outs, so that I have four 
> rather than one, to save having to use a separate midi thru unit or 
> keep swapping midi leads.
> 
> I know it isn't as simple as just hooking four sockets to one 
> output, I'd guess I'd need to split the signal and use non inverting 
> buffers before each output - a 4050B looks like it would do the job 
> nicely. Can anyone out there help?
> 
> If anyone else is interested in this mod I'd be quite happy to 
> design up a small pcb, and either post up the gerber files or even 
> get a few made and sell at cost if there's a demand

I've already done this, and laid out a PCB for it for a customised
ready-built unit.
I've uploaded the overlay and foil as PDFs to the files section at
Yahoo.
You need to replace the resistors R4 and R5 with wire links.
The output board then has a BC547 and BC557 configured as a
non-inverting buffer able to drive the 5 MIDI outs.
I dropped the DIN sync output on this board, so if you want multiple
outputs and DIN sync, I'll need to tweak it a bit.

Cheers,
Colin f