[sdiy] DIY MIDI clock to sync pulses

[Dave Kendall]

Hi Louis.

Blacet research does a MIDI SYNC IC based on a PIC for US$16 that comes with
printed app. notes to give clock frequency division, DIN SYNC, and some
pointers on how to get a simple 8 or 16 step sequencer too.

I've got a *mostly* completed perfboard circuit as per app. notes circuit
waiting for the time to complete it, but haven't tested it yet......juggling
too many balls in the air right now :-)

http://www.blacet.com/misc.html

Hope this helps.

Cheers,

Dave


on 15/8/06 22:30, Louis van Dompselaar at louis at dompselaar.org wrote:

> Hi
> 
> Can any recommend me a simple midi clock to sync pulses circuit,
> preferably PIC based?
> 
> I've already tried Bareille's MC628 but I can't get that to work, simple
> as it is...  I can trace the MIDI signal into the PIC but that just
> doesn't seem to respond to it.  I've already tried replacing the PIC,
> re-verifying it was programmed correctly, changing the crystal, all
> without success.  As Bareille specifies a non-existant 8-pin 4N28
> I have also tried some true 8-pin optocouplers, just to see if
> the output signal might be slightly different, but no luck.
> 
> The PIC does appear to initalize though, as it pulls up RA1 after
> powering up.
> 
> Anyway, I'm fed up with this circuit, so I wondered if there
> are any others around.
> 
> Louis
>