Pls help a newbie!!!

Paul Wagorn pwagorn at pinc.com
Fri Jun 11 18:10:33 CEST 1999


Help!    I've got something SIMPLE I want to build, but don't know enough to
actually get the right components.  maybe someone could take a second & help
me out a little.....  I have electronics experience, but not enough to know
chip numbers, etc & how exactly they work.....  I'm just starting out in
this digital stuff....

here's what I want to make:

a sequencer for triggers. ie NO cv's - just triggers.  16 steps, 16
switches. one trigger output.  takes a din sync clock.
I may expand the idea to 3 or 4 rows of 16 & 3 or 4 trigger outs, but the
logic of it should all be the same.  I have LOTS of devices that take
trigggers & I want a way to sequence triggers live.

here's what I'm thinking I need (THIS is where I need the help!):

1.  some sort of counter that will take the 24ppq & change it into 4 ppq (ie
16 steps in a bar).  now, I guess I need something that will count to 6 &
then reset, right?  take the first line from the counter & go into ........

2.  some sort of counter that counts to 16.   each pin of the 16 outputs
goes to a different switch (of the 16 switches) & then all the outputs from
the switches go to the trigger out.

does this make sense???  PLease comment....
What I'm having a hard time with is the different kinds of chips... ttl?
cmos?? I figure for the first part, I can just get a count-to-10 chip, &
hook up the 6th line to the reset line & it will count to 6, right?
sychronous reset? asynchronous reset?  what's up with that?

I can't find a count-to-16.   is there such a thing?  if not, what is the
easiest way to count to 16.... I could probably figure out the logic, but I
simply don't know what the common IC's out there are.... don't know what I
have to work with...

Any help would be really appreciated!

Thanks!

Paul












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